EliteCM.net

This is probably a stupid question but does the winter cold have an effect on gas consumption if you have a cold air intake?  Lately my car has been consuming more gas then it usually does and i just changed the oil so i don't think that has something to do with it.  Any help?

My assumption would be yes. Colder air = more dense air = more air getting into your engine = engine running lean = add fuel to mixture to make it less lean = more fuel consumption. Don't quote me on it though.

I think that might be the reverse Jeff, i.e. a cold air intake is suppose to make for increase fuel efficiency so you should see a similar behavior. The grade oil you put in does affect your MPG, heavier=lower MPG and vise versa. I could be wrong, but my understanding is colder air leads to a more complete combustion, hence increase MPG.

Colder air yes but, in some areas we experience extremes. The other thing to think about in line with your thought is that colder weather will make your oil thicker. The other obvious question is have you been warming up your car before driving

Don't they also add something into the gas depending on the season...like summer blend and winter blend? Maybe that can also affect fuel effeciency.

Ethanol is your enemy. Winter blends tend to have more of that shit which leads to a little worse mileage.

how big of a swing are you seeing in mileage per tank?  typically on a highway-heavy run i can pull roughly 400 miles out of a tank and over xmas i did just that.  right around 420 miles from a topped off tank to one with about a gallon left in it.  that's about 95% highway too... 28-30 MPG approx.

Well your right about the cold air making the oil thicker which can be a cause, but as far as for Ethanol i didn't know about that. The MPG I've been seeing about 300 miles per tank not precise though where before i would probably see some where around 350-400 maybe and its mostly city highway's but some city streets as well.

So my issue is that my car has been giving me poor fuel economy...  I'm not sure if it came slowly or instantly, but I noticed a big change in fuel economy recently.  I'm not sure if it could be modification related or not, but I'm not exactly sure what the issue is here.  Maybe some of you members can help me troubleshoot and give me tips on what to look for.  I own a 2007 Honda Accord coupe.  It's a 4 cylinder, so I should be getting decent gas mileage.  It's rated at 24city/34highway.  I drive roughly 110 miles daily all highway, so I should be getting ~450 miles out of the tank, give or take a few miles for a little city driving, but instead I get around 350-400 miles to the tank.  I don't drive aggressively so I know that it's not me.

Here's a few things that I've checked already:
STFT (short term fuel trim)
LTFT (long term fuel trim) - Around 3% so it's actually adding a little bit of fuel. It's negotiable. I have the icebox mod, tb coolant bypass, tb heatshield, etc etc.
IAT - normal
Load - 20% at idle.  I'm not sure what's normal for our car, but I figured that was since I'm DBW.
CTS - normal
Intake timing adv. - normal
Tire pressures - ~35psi cold (all around)

So I figured that the engine is running fine.  I have no MIL set.  What else could the problem be?
I don't have my fender liners (as they ripped off)...  Not sure if that contributes to anything
I have poor alignment also since I just recently lowered the car more.  I know that can affect fuel economy, but I figured that it was slight.

Any ideas?  I can put up with it for now, but I just want to figure out what the issue is.

A bad alignment would cause more than a slight loss. The car has to work harder to achieve the same speed/ distance. I would get that taken car of right away.

check air filter....spark plugs....maybe try running a can of seafoam.... could be an injector issue possibly....
also could be a shitty gunked up catalytic converter.....you experiencing any funky smells ?  fart/sulfer like stank ?

Oh right, I forgot to mention.  Air filter is new.  I checked the spark plugs a few weeks ago and they were good (no fouling, etc etc).  Not so sure about the faulty injector...  Catalytic converter should be ok.  No funky smells and the afr is switching back and forth around 3% so it seems okay...  Any other ideas?

Your O2 sensor? What weight oil are you using? Your driving style? I go to cal poly and if I drive normally up Kellog hill I only get 18mpg. If I keep it slower i get 24mpg.

I haven't checked my o2 sensors, but I believe that they're a non serviceable item and they only get replaced once you get a MIL light.  I'm using 5w-20 synthetic pennzoil platinum right now.  I know my fuel economy issue isn't related to that because I noticed it before my oil change.  I drive very calmly without any hard acceleration.  I rev to 3.5k the most on a daily basis.  My route to school is 5n -> 55n -> 91e -> 15n so I don't go up and down any hills at all.  My fuel economy should be pretty damn good. I'm just confused.  I'll get an alignment this weekend and see if anything changes.

You can do resistance test on your O2 sensors to check for proper operation.

Can you further elaborate on this procedure?

O2 sensors don't necessarily fail completely and at once. They can lose their efficiency/speed slowly that the ecu might not be able to detect it.

im not sure how many mileage you have on the car, but some poeple on here changed them at 100km. i have 103km and i changed them yesterday, and there was a noticeably improvement in performance. ill let you know if i notice an improvement in fuel economy. if you have over 100km it wouldn't hurt to change them

What about weight?  Do you have anything heavy in your car or are you carrying around something new?  Did you get different wheels or tires?  I agree with Mike though.  Get an alignment done because that can definitely make a difference.

Just pick up a Haynes manual at your local parts store it should be in there.

Keep me posted with that.  I'm at 103k miles so that may be a necessity.  I know my tech recommended the same thing for my mom's mdx.



I have nothing in my car.  Literally.  Only me and a backpack.  I still have my work emotions, not much different from my old 5zigens.  I used to get good gas mileage with the same setup back then.


Althoughhhhhh something may have come up.  Before, my car used to make this weird noise from the front left wheel hub.  It's not a grinding or a clicking noise, but a sort of metal on metal clicking sound.  It's constant.  Doesn't matter whether or not I'm turning.  As long as the wheel is turning, it makes the noise.  I also have another noise, which may be associated with this.  When I'm driving at highway speeds and I'm making a sweeping right turn, the front left tire hums...  But only when turning.  It makes the same noise when I'm turning left, but not as much.  It's the signs of a bad wheel bearing and I know it's not good to keep driving with it.  Any ideas on whether or not that can cause poor fuel economy?  Also, has anyone had a wheel bearing go bad on them?

to check if your wheel hub, simply lift your car and check for play in the wheel. your wheel shouldnt have any play when you try to move it up and down. also if you have a nail in your tire it could cause your tire to click. check to see if you have anything in your tire

A bad wheel bearing could be the culprit also Brian.  I had to replace a rear wheel bearing a few years ago when I lost it on an icy road and went into a small snow bank sideways.  You should be able to pull it off man.  It's not impossible to do.

There's no play in the wheel.  Just noise.  But the wheel bearing is bad.  I know it.



Yeah, I figured it could be an issue too.  I'm just thinking that a front wheel bearing could be more difficult to do than a rear wheel bearing.

Are the wheels and the same size and weight as the old ones?

They'ye maybe 1lb heavier.  Definitely lighter than oe.

Tires also?

Same size as my first set of aftermarket wheels when I used to get good gas mileage.

I'm being nit picky about the weight.  Certain wheels and tires may be the exact same size, but a completely different weight.  Have you done an alignment yet?

I have not...  I'm going to get that done first thing tomorrow.  I'll probably find the spec sheet to be super ridiculous.

Make sure to post it up here so we can make fun of you.

Sounds like a plan

Clean your MAF...probably won't help much but likely won't hurt.

O2 sensors usually get lazy...they don't throw a MIL but they just don't respond like they should.  I'd be willing to bet that's a big part of your mileage loss.  As for checking them, I don't know...I just always considered them maintenance items.

Have you considered seafoam?

I clean my maf everytime I clean my filter.  I just seafoamed my motor a week ago too, so I'll see if I notice a difference.  My o2 sensors may need replacing.  I'm not sure how willing I am to replace them.  It depends on price, mostly.

Gas prices in the south are climbing. $3.50 roughly for regular. Tipping $3.85 for Premium. Do the higher gas prices make you consider driving a bit more normal? 19MPG in this V6 makes me wish I had my 2.4 again!

Go get the S2K. Do it now and never speak of missing your car ever again.  

In response to your comment, I continue to drive light to light.

$3.35 here.  I drive a little lighter.  Right now I'm getting 32 on the hwy and about 23-24 in the city.  Not bad for a thirsty V6.

$3.45 here in Orlando. I've been getting about 26-28mpg, mostly highway with a lot of sudden stops, and going around 70-80. I could probably get a shitload more if I drove 60, but I'm too impatient for that. :P

I have altered my driving a shit ton @ about 3.39

Am paying around 4.50 for Premium in my area Nyc but i been getting a good 28mpg city just cruising

it's been around 3.70 for almost 2 months here in california south bay area.

The last 2 weeks it has climbed like 20 cents. It's about $3.98 per gallon right now.

I haven't altered my driving at all.

They say its gone down a little due to what's happening in japan

I'm the same as Clemente, I've seen it at $4.50 for premium.

Why are you buying premium?

I filled up this morning at 21.7 MPG. That $50 bucks hurt though.

I've noticed that I get better gas mileage in my car with premium. It's an extra $2.00 that makes me happy inside.

i paid 3.69 first week of march, ive been getting 21 mpg on a 4cyl. pretty shitty but i drive 2.2 miles to work, 2.2 back to home. and thats pretty much it.

50mpg would be nice, just sayin

I want a solar powered vehicle.  Alternatively, I would like a vehicle that runs off of the positive energy that I emit on a daily basis.

Fairy..sorry, terrets...if that were the case, most of us would get 3mpg  :D

smoker.

MPG doesn't really matter cost per gallon CPG is actually the better number to look at.

Man, how are you guys getting such good gas mileage? I've got about 1000 miles logged in my GPS so far, and it's showing 24.6mpg. Usually I notice that the GPS is 1mpg less than what it really is. I don't think I've ever gone over 30mpg on my car.

a lot of coasting!

I used to get about 34mpg on straight hwy doing 70 in my 4 banger. Around town in both I4 Accords I got 23, even the TSX and S2k got 23 lol. V6 Accord gets close to 22 around town.

I get like 19-20 around town and close to 30 highway.

You know what, it could be the fact that when I'm on my 80 mile drives from UCF to home, traffic will randomly go from about 70 to 10 about 10-20 times.

Staying out of Vtec helps a shit ton also.

I've modified my driving habits.  I filled up on Monday night and it was $3.85 for premium out here.  I don't drive my car that much any more.  I basically drive it on weekends and maybe 2 or 3 nights during the week going somewhere local. 

I changed  the way i drive too i take all down hills in my route and most my driving is at night with almost no traffic so that helps alot to boost my mpg up

Tim 3.85 for premiums is cheap compare to Vegas it's a little above $4 in here and I filled mine up w/ 89 from the half way mark it's  about $40 wow!

GAs hurts in CA, 87 is now 4.09 and that pumping at costco... 13 gallon was almost 55 dollars.... I have to pump 3 times a month. But at least its getting 27mpg mix for a v6

I haven't filled up the Accord lately, but I should soon.

Neither have I but it'd be nice to know what the hell my brother is paying for gas and what he's actually filling her up with.

It got average of 28.8 mpg from NYC to Boston, doing about 75 mph.

I know there are a couple threads already about average mpg so I won't go there, but I think I might need some clarifications on some ideas since I only seem to be getting like 26-27mpg with 80%+ highway driving I thought I would with this car.  Pardon me if this questions seem silly.

1.  When I drive I usually try and keep it under 2k rpms unless I really need to pass or get up to speed in which case it stays under 3k.  Would you consider this driving conservatively?  I was under the impression that v-tec kicked in above 3k so keeping it below that was ideal for mpgs.

I guess my thought was I feel like I'm driving the car conservatively but maybe I'm not and thats the reason for the getting less than I though mileage wise.

the stock tune on a k24a4 or a8 has a vtec engagement point of 2200 rpm's, with the amount of highway driving that you do i would say that 27 is average. of course the more you mod your car the more the mileage can fluctuate depending on your driving habits.

Another thing is the revised EPA ratings for our cars were a lot lower than the original ones. Our cars are rated to get like 21 city / 31 highway. I used to get really pissed off because I would only get 20mpg driving to my high school and back.

I've only fueled up my car twice so far, and I got 26mpg for the last one, which was pretty much all highway and me having a little fun on long straightaways out in the middle of nowhere. I don't call myself a really conservative driver, however. In normal driving I try to stay under 3,000RPM, but when I need to pass, I pass, lol.

One thing I don't get is how all these people that I see posting on Driveaccord.net are getting like 450-500 miles on a single tank. Even when I get 26mpg, I can just barely get 350 miles on a tank. What the heck? lol

450-500 is crazy, i can get at most 375-400 but that is running on fumes.

I get a good 26 city and 30+ highway on my v6  i was always under the impression that the 4 cylinder people got better numbers

I think it's because the i4 has to do more work... I wouldn't be surprised if the v6 got better gas mileage on the highway.

I used to get 450 on my 4banger and I drove it like I stole it sometimes. All I had was tsx im, pulley& cai. It was an lx so it was a few hundred lbs lighter then the ex. Maybe that's the issue? I drove it until the light came on. 3 gallon on reserved

Nah. I get about the same 350 to the tank and that's filling up as soon as the light comes on. Granted, I know I probably have a good 100 more miles before I hit fumes but I never take that chance. I'm probably due for a tune-up anyway when I get home but that's my experience with my mileage. That mileage is also while driving like an asshole in NY and for a short time in Miami before shipping out.

I drive like an asshole here too and I get 19-20 mpg's in the city.  When I go On long road trips I typically get 29-30 mpg's on the highway.  The 6th gear is really handy for that.

i try to keep mine under 2400 RPM (I can do 83 at 2300 RPM).  Doesn't limit highway speed but does net a positive impact in the city.

Wow I have to say I'm kinda bummed reading this.  My old supercharged V6 regularly returned 25mpg so I was hoping for better out of the 2.4.  On the upside thank you for all the replies and I guess it's good to know that I'm not getting below average gas mileage.

I'm pretty sure there's at least one more thread put there like this one. Check it out and you could find some further input.

Reason you were getting better mileage with the SC V6 is because the engine had more power and had to work less to move the weight of the vehicle. If you take a look at what Tim's mileage numbers are fully modded compared to my mostly stock numbers, his mileage dwarfs anything I could hope to achieve. Its physics if you really think about it.

i get about 30mpg in city and highway mixed. on the highway i am getting like 33. but i think my last trip i just did to Rhode island would have netted me better mileage but didn't keep track

Hmm well that just sounds like a great excuse to spend some money :)  "Nah honey it's for better gas mileage >.>"

Exactly.

Now I just need to find some money to spend.

Seems like I'm the only one not getting enough miles from each full tank...ranging from 200-220 miles per tank...any tips and advice?

06 Accord v6 w/ cold air intake...oil gets changed timely and tire pressure is average.

give us some more background...are you a new driver by chance? do you take off at every stop light? how many miles does the car have? all other maintenance performed regularly? do you clean the air filter as needed?

not sure what tire pressure is average means...put the tire pressure at the pressure noted on the sticker in the drivers side door seam.
maybe try resetting your ecu (unplug battery for ~10 minutes, plug back in and let it idle on its own for 5-10 minutes)

I just filled up today with 510 miles on the tank. It was all highway. Took 16.5 gallons to fill up haha. I paid $3.359 a gallon.

I paid $3.75 today and thought it was cheap. Got a bonus though randomly from the car next to me a very very nice looking women decided to fill her tank in a thong bikini... Best fill up I've had in a long time!

Picture or I call bullshit.

shit ive been paying 4 bucks + or - 13 cents, and a i only get 22 mpg in a 4 cyl.

Not a new driver at all....i dont take off at lights...70k on the car...tire pressure is where its suppose to be because i check every so often...i change the oil regularily but as far as the filters not really...i have a cold air intake and use the cleaning kit to clean the air filter...cabin filter was changed so idk what other filters are needed to be cleaned...i havent changed the tranny fluid and thats where i think my problem would be..but idk...resetting the ecu by disconnecting the battery has been done but nothing...o and since gas went up i switched to 89 instead of 93... Preferably sunoco

Call Bull shit all you want, I'm also not going to get arrested for being a creep.

 >:(

During the summer time I put the below pictured oem roof rack on my car because my wife and I like to bike in different places on the weekends when we can.  It becomes a pain in the ass to have to remove and install it every time so I typically leave it on for the late spring / summer / early fall months.  Point is, during my drive yesterday to D.C.  I noticed roughly a 3 - 4 mpg drop in gas mileage with the rack on the highway.  I need to get a front fairing.  Thinking of getting the Inno 39" fairing to help with fuel mileage. 

-.- so for the past month and a half, I've been getting 250-200 mpg. Before I would put gas at 325 which was a 1/4* of a tank left.... I've changed sparkplugs to ngk laser iridium, changed the filters, put synthetic oil in. any ideas?

I believe 44" is the correct size fairing for our cars.  I just put my rack on last week and haven't filled up yet.  I'm gonna fill up tonight and we'll see what a difference it has made.  If its noticeable I may be askin for a fairing for xmas. :D  (I also have an OEM Honda (rebadged Thule) roofrack)

But as for gas mileage I am absolutely LOVING my 6-6.  I started using Fuelly.com back in June or July and its great.  Since then I've been averaging 25.5 mpg mixed driving with a best of 30.3 mpg on the highway.  And that trip was down to NC from PA with the cruise set to atleast 80 mph the whole time. :D

Okay tell me if I'm understanding this right. For a month you have been getting 200 - 250 miles per tank. Previously you would fill up after 325 miles, and at 325 you had 1/2 a tank left?

at around 325 i was at 1/4 of a tank... now if im lucky i get 250 and thats on empty, usually its at 200 on the E line...its been about a month and a half... i've been putting premium because i noticed it lasts longer

So 2/4 ‘s = 1/4 maybe my math was wrong I thought it was ½. Have your driving habits/routes changed?

no, i drive the same, i actually have to rive slower because its 35 on post. but 13 mpg? i doubt it would get that low, i've taken her on the highway, just to test it out to see if i gotbetter on highway, its about the same..in fl at 325 i had 1/4 of a tank left. when i got here TX gas mileage dropped about 15-20 miles, figured t was because of the diffence in altitude. and slowly it would go lower and lower per fill up. until the beginning of OCT, where i would get 200 mpg., and its stayed around there. there is another guy here on post with a 4 cyl 4 door 5mt, and he gets around 300..



*edit* lol just noticed i put 2/4 on the pother post i meant 1/4... lol

FIXED (200mpg to 200 mpt, or did you mean 200 mph? ;) jk)

Yeah there is DEF somethin wrong there... you have an I4 right?  I dont think I could get that bad mileage if I ran around with it PEGGED all the time...

lmao, i wish i had 200 mpg... yea i meant per tank. i type too damn quick. and yea im i4.. i dont even peg her to be getting that shitty mpg

Yeah that isn't right.  When I had my i4 5at I would get 25mpg only if I floored it a lot and never went on the Highway on that tank. It averaged around 27 to 30. Have you tried using some sort of cleaner? Does anyone on here recommend Seafoam? That shit kind of scares me so I've never tried it. I've used some of the STP fuel system clears before but to be honest it didn't really do much. I noticed maybe a 1mpg increase and very slightly better performance (might have just been in my head).

On a side note, I completely agree with you Ryan, my 6-6 is great for gas mileage. I got 32mpg average on my way up to Chicago a few months ago and almost 400 miles on that tank. For normal driving I get right around 300 miles a tank and 22-23mpg (I do like to floor it occasionally). Much better than what I first expected from the J30.

yea i've been putting a fuel cleaner every other fill up to see if it would help and it doesnt :/

*edit*
I've been putting this in, i've done it 2 times now, i used the stp one the time befpre that...
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Techron-Concentrate-Fuel-System-Cleaner-%2820-oz-%29-Chevron_7080568-P_N3232_T (http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Techron-Concentrate-Fuel-System-Cleaner-%2820-oz-%29-Chevron_7080568-P_N3232_T)|GRP2030C_____

Ahhh, damn. I seem to remember reading somewhere that this was happening to other people too. Unfortunately I can't remember if I read it on V6P or DA  but I'll keep an eye out for that thread for you.

ok thanks, yea I'ma go to advance and buy the seafoam, cant hurt to try right? now question. i keep reading mixed reviews on oil change after. like its fine with it, or have to change right after, what do you guys say? (to those who've used it)

I used it once, didnt really notice a difference.  I usually throw in Lucas FI Cleaner every couple months.

whats your mileage? im at 122k

97k

when'd you seafoam?

last yearish... maybe 2 years ago lol

so daily how far do you drive?
my old job was 5.1 miles round trip. and i would only drive there at back i got 23 mpg. now i get about 27. but all city driving short 5-10 min trips.

same, about 5-15 min trips, about 5 times throughout the day while im at work... about 20 minutes back and forth for lunch

Ok so i juat seafoamed, guess what??? No smoke..... none at all -.-

Which way did you do it? In the gas, in the oil, or through the intake?

All 3.,1/3 in each , a little more in intake

I already made the funny and corrected him Noob...

Seafoam = Bad

Even with my heavy sedan and making about 325 whp with the K24A2 and supercharger, I got around 28-30 mpg.  There are a few things that could be causing the poor mileage.  You could have a clogged cat.  Your alignment could be off (not likely).  Your fuel pressure could be higher than normal and you could be running rich.

I think i have tryied it all seafoam lucas ect.. i stuck with marvels mystery oil in the gas tank and oil i actually felt a difference ,with smoother start ups and my fuel economy.i see myself gasing up less now at the pump

Sent from my HTC_Amaze_4G using Tapatalk

my alignment is off, but its not by much... its been like that for months. even when i was getting the 325+

Yeah and he did it again... haha

Can you elaborate on Seafoam = Bad?

One of the conversations I had with Paul a while back is that if seafoam loosens up the carbon deposits in your combustion chamber, it will blow it out and clog up your cat.  If you maintain your vehicle with regular oil changes, you really shouldn't need to use anything like seafoam.

Is there a way I can check to see of the cat is clogged without taking it off?  the previous owner and I always filled w/ premium fuel, not sure if that made a reason why no smoke  came out at all when I srafoamed yesterday.... I smelled the chemical. Still no increase in gas mileage. 93.7 miles into the tank and I'm 3notches above half a tank

I would venture to say you have a fuel leak somewhere. It's not common on our cars but, you may want to visually inspect your tank, filler neck, and fuel lines. If your car is running right and you have no CEL's and MPG has dipped that much the gas is going some where.

Yeah, it could be a fuel leak.  Another answer could be that something is causing it to run rich.  I know that a lot of times when you get a CEL for certain codes and it goes into "safe" mode, it basically keeps you out of VTEC and keeps VTC at 0º and just dumps fuel.  I'm not sure if you've tried an ECU reset, but it may be worth your while.  Another thing is the short trips.

Limp mode blows!

I would venture to guess there would be no blowing in limp mode. Wouldn't know first hand though.

i have done the ecu reset, both ways. w/ the ground off battery for 20 min, and the key in ignition way...also i put in my CAI today saw this, in the TB bad? or ok?
(http://i420.photobucket.com/albums/pp283/papinati305/IMAG02461.jpg)

Doesnt look so bad but while you there ,Open your TB and see if theres any carbon build up whille you at it just clean and lubricate it

That wouldn't cause your mileage to drop that much.

Little bit here, little bit there, it all adds up.

did the tb cleaner today, it was pretty clean from the seafoam i did last week..i used about half a rag to clean lol, and it came out mostly clean.

I took a drive to austin on saturday.. i went 93.8 miles and i still have over 3/4 of a tank, (long straight drive), when i drove around the city at 1/2 tank i was at 118. -.- so highway mpg is fanfuckingtabulis , but city mpg is more horrible than 2 girls 1 cup...

Slightly inappropriate? Yes.

but it got the point across....

Chris I think you jinxed me... I only got 300 on this tank before the light came on... usually I'm at around 330-350 before it comes on...  I wouldn't think the roof rack would make the difference that much, but oh well "Santa" is getting me a Thule Fairing for xmas. ;)  So maybe thatll help.  Or maybe I just got a bad batch of gas.  Oh well.

yup still doing horrible.. @56 miles im at 3/4 of a tank... :(

I fucking hate winter (without my winter tires on) I'm getting them put on tomorrow but seriously, I only got 270 miles out of this tank thanks to my "all-season" tires spinning everywhere :p

last was 22.5 and i do drive it hard most of the time

I've seen a def drop too... and I havent put my blizzaks on yet... :'(

I know its a combo of the snowboard rack and the shitty winter fuel mix, I'm gettin a fairing for the rack for xmas, hopefully that helps... I've seen a drop of i'd say at least 3 mpg in the last month.

My average is just under 21 MPG. I drive like an asshole though.

you alll can shov it....

The roof rack definitely fucks up mileage.  It did with my car.

Yeah, I figured as much.  I can deal for a couple months.  Not the end of the world.

I have to throw my roof rack in there so I can go get a Christmas tree.

(http://i420.photobucket.com/albums/pp283/papinati305/2.jpg)
(http://www.v6performance.net/forums/images/smilies/peepwall.gif)

Care to provide more information Chris?

Fairing is officially on.  Well see how I do on the next tank. 

Anybody else on Fuelly?  It's an awesome way to track your mileage.  I update it with every fill up.

lol surprised ryan didnt say anything to that pic..... dont you guys remeber how i have been ranting on and on about only getting 200 mpt?

oh, so you got over 400 miles to that tank?  That's a good thing I guess.

Whatd you do to fix it?

Yeah, thanks for providing nothing at all Chris.

probably all highway miles..

I use Fuellog for Android. It's really nice. It breaks down nearly every stat for your mileage, and it includes an estimated yearly cost for fuel.

I drove up to SC about a week ago, and got 32mpg. That seems pretty decent for the i4, considering that I was going about 75 most of the time. I bet the v6 gets better gas mileage at higher speeds.

Best I pulled in my 6-6 was 30.3 on a trip from Pa to Nc last summer, doing 80+ the majority of the trip. :)

That was before the PCDs and j pipe were installed,  not sure of how that should affect the mileage.  But yeah Fuelly breaks it down pretty good.  No app yet, but they do have an easy to use mobile site, so it's just like an app.   

I started using Fuelly last summer on the Nc trip and at this time my total avg is just below 25 mpgs, which with the way I drive... I'm more than happy with.

I used to get around 28-30 mpg on the freeway.  I can't wait to see what kind of mileage I'm going to get when I get the new motor in and have it tuned.  I'm definitely going to make sure they tune for good fuel economy at cruising rpm's.

LOL believe it or not it was mixed... Hwy/ city..2/3 being highway. Ended up getting 418 to 2 notches above the empty line. Apparently my problem is my cat.....when I went to get my exhaust done they did a shitty job and cut my cats exit off and welded the new pipe... When they did that my gas mileage has gone through the roof.....pure hectic city driving in Miami and im at 212@ half a tank

So now that gas prices are officially (almost) to $4/gal. Are any of you guys doing anything to get better mpg, looking for a beater civic to get 35mpg, etc? I tell you, I’m sick of 22mpg. Stuipd V6.

gas is already above $4/gal in my area and i'm looking at purchasing a v8 for my next car, haha..  I've already resigned to the fact that gas is expensive, and its a necessarily evil.   although, it would be nice to have something more fuel economical.

if you're tired of 22mpg, you probably shouldn't look into getting another s2k.. that's about what you would expect from an s2k, give or take a couple mpg..

Well my car just reminded me I have a city commute again... last tank pulled 18 mpgs :(

Mark, I got abt 24mpg in my s2k, its worth it, not so much in a mazda

got 20.7 last tank. got heavy foot since i dont drive car much. next two tanks should be a lot better for cams brake in

Gas prices around here are still around $3.50.  I do the usual and common sense stuff for better mileage though.  I try to remove any unnecessary weight from my car (loose stuff in the trunk and interior of the car), raise the tire pressure slightly (up to about 40 psi), remove the roof rack when not being used, drive very mellow (easy on the throttle, let my car coast to stop lights and use the engine braking instead of regular brakes), keep it under 70 on the freeway and draft other cars and trucks (not too closely though).  I do all of this stuff safely, but the main thing I keep in mind is that gentle driving is a great way to get better fuel economy.

If I drove less than 70 I'd be late for work twice a day.

I drag race every light

I could get that if it were highway miles, but combined city/highway, I could only dream of getting 24mpg.  I don't speed, either; I average 65mph on the freeway, sometimes going up to 70mph but for short periods of time; I don't accelerate fast; I basically don't drive the car hard at all.  I waited until I had 0 bars left on the fuel gauge once and I got 240mi on the tank.  I don't recall exactly how many gallons it took to fill it full again, but i think it was somewhere between 12.0 and 12.5; which would have given me about 19 - 20 mpg for that tank.  I think the best I ever got for combined city/highway was 21 - 22 mpg.

leave a couple minutes earlier.. speeding doesn't always get you there that much faster, it may save you a minute or two, but you could have left a couple minutes earlier and made it there the same time.  you might even hit a different traffic light pattern that may get you to work sooner.

No traffic all highway... I only got 75 or 80... I leave one job and have to be at the other 30 min. later... It's about a 20 mile drive.

what a world of difference that does lol. I unfortunately don't have space to keep my rack (besides locked onto the roof of the car), but I've had it off that last week, sitting in the middle of my living room, while I change out the rubber pads it sits on and damn my gas mileage just skyrocketed!

It's probably better to keep it in your trunk when not in use.  That's what I would do if I didn't have the room for it in my garage.  I know the roof rack doesn't take up much room, but I also know you have a bike rack which I am unsure how big and bulky that can be.

Gas hit $5 a gallon at one station on long island. This shit is crazy

and then these fools want to tax that shit too! ... Smfh

$5 a gallon? Wow, that is crazy! And I thought $3.69 here in Ohio was bad.

damn, that station has San Diego beat.  and San Diego was rated to have the highest average gas price in the nation according to an article that released yesterday.

http://www.utsandiego.com/news/2012/feb/27/gas-prices-among-highest-san-diego/ (http://www.utsandiego.com/news/2012/feb/27/gas-prices-among-highest-san-diego/)

It's at 3.99 out here in Washington. Shit jumped up out of nowhere ???

Just like Bobby said, it jumped to about $3.69 here in OH.  Prices were as low as $3.18 less than a week ago.

About 2 weeks or so ago, I filled up at $3.95/gal.  The other day, I filled up at $4.56/gal; I'm sure the prices have only gone up since then too.  These prices are for premium.

Switched back to 87 octane on the last fill up and the first tank was 28 mpgs. Very nice compared to my last three tanks of around 18 mpgs. Pretty much the only thing that sucks about working back in town, but the tanks last 2 weeks longer, so it evens out. lol

I think for the first time ever I made my usual trip from Chicago down to Champaign on cruise control going exactly 65 the whole way down, with A/C on. I ended up getting 40.1 mpg using only a quarter tank, where usually I get around 22 while driving like a mad man. Maybe it's time to slow down...

I might try the speed limit for a week, and see what it does for my wallet. With a difference like that at the current prices I could save a fortune. Basically with those numbers (I know its expanded because of the long highway trip) I could divide my fuel cost in 1/2

I make an effort to take it easy on the gas pedal... then some idiot cuts me off and I have to blow by him just to give him the finger  :flip: <--- Me

LOL

(http://img.tapatalk.com/d/13/02/15/jujaqeje.jpg)
I think this is very good mpg. 80%freeway and 20% city, I even have some pulls in there. I drive a V6-6 speed. No engine mods. I shift at 2k-2500 rpm and always use cruise control when I can. This mpg is better than what I got in my 99 accord 4cyl 5 speed which I find is amazing. I could've gone even farther I still had over a gallon left and the gas light didn't even come on yet.

Good lord. Filled up today at $3.85 and got a whopping 18mpg on my last tank. In an i4. What the fuck. My mom's 2012 TL gets better gas mileage than that.

^^ Wow that seems unusually low.

Agreed. With as hard as I drive my car, I don't get that kind of mileage. I'm usually in the low to mid 20's depending on if I was nice.

I wonder if this has anything to do with the laggy vtec engagement that I've been getting. The car feels like a complete slouch until I get over like 3,000 rpm. Who knows.

Possible.

Hell, even I get 20 mpg on E85.

I get really good gas mileage!  :flip:

(http://i1056.photobucket.com/albums/t377/DreaminAccord/A38DAADB-0286-4563-A7C6-871FA6076B22-34027-000005EBEB2F1FA1_zps3dce7802.jpg)

I think my mileage is sucking due to winter mix gas am getting low 16's City wise which went down from 20ish

mud guard came in the mail. More crap to install during spring break :)

This is how much i have been getting lately. This is 100% city driving (gf going back and forth to school). I have an I4, with HPS Short Ram Intake, Ralco RZ Underdrive Pulleys, TSX Intake Manifold and a brand new Denzo O2 Sensor. The old one gave me a CEL a couple of months ago and i replaced it. But the MPG still suck! Does anyone have an idea of why this may be? 16 mpg cannot be normal.

(http://i1306.photobucket.com/albums/s576/olecram93/IMAG1687_zpsb90f8b5f.jpg) (http://s1306.photobucket.com/user/olecram93/media/IMAG1687_zpsb90f8b5f.jpg.html)

(http://i1306.photobucket.com/albums/s576/olecram93/IMAG1688_zps77f2f8c4.jpg) (http://s1306.photobucket.com/user/olecram93/media/IMAG1688_zps77f2f8c4.jpg.html)

On 100% highway, cruising at 80mph I get 25mpg.

Could be a lot of things. A clogged cat, bad alignment, or even your tires. How you drive has a lot to do with it too. If you're race boy all the time, don't expect to get good fuel economy.

burning any oil?

Tires are 2 months old. Alignment was done right after the tires were replaced. I drive like an old lady, specially now that it has been this bad with fuel economy. I keep getting constant 16 mpg in the city, fill u after fillup.


Yes, lately it has been burning some oil. What does that mean?

Im getting 26-30 in my TL 70% hwy driving. I start off as high as 35 then by end of the tank it's high 20s. Computer calcs are spot on.

Ive been averaging 29-30 a tank with the Sport.  Dropped a bit since I put the rack back on and turned off ECO.  I'm gonna turn it back on next tank and see if there's a difference. 

So far this tank is read 26-27.  But I'm still seein 30-33 on trips, with a few random 25s thrown in.

I mentioned tires because it could be the tire design causing it, not the age.  Just because they're new, doesn't mean they're good.  Some performance tires will hurt fuel economy.  Just throwing that one out there.

Even when I was making about 350 hp with my stock k24a2 and m62 supercharger, I still got about 30-32 mpg on 93 octane pump gas on the freeway.  Hell, even with my 400 hp built motor using the same supercharger I averaged about 20-22 mpg on E85 on the freeway.

I get 22. Its my driving

Right now I'm getting about 25mpg with 50% city / 50% highway driving. It was a lot worse before, on average around 20-21, but it seemed to have improved after I put some Marvel Mystery oil in the gas tank and engine oil a few times. You could give that a shot.

That doesn't make sense then. There has to be something wrong. I used to get good gas mileage. It all started with the O2 Sensor, i got a CEL for the bank 1 sensor 2 but i kept driving the car like that because it was just the O2 sensor so didn't pay much attention to it, then all of the sudden this horrible gas mileage started happening so i decided to go ahead and change the O2 Sensor, but now the O2 sensor is brand new and im still getting horrible gas mileage. Did i mess something up by driving with a bad O2 Sensor? That clogged cat you mentioned got me thinking Tim.   


I probably will, and see if it helps?

Bad sensor readings creating bad signals causing the car to run lean or rich could clog the cat.

I see, and how can i test for a clogged cat?

Would taking off the Cat and gutting it, fix the clogged issue? Basically turning it into a test pipe?

Truth


Sure, go for it.  You can also have the flanges cut and welded on a pipe if you want.  That will reduce turbulence in your exhaust system.

Can't forget the defoulers for that rear o2 sensor.

Thanks Tim. I will gut the catalytic converter for now, to see if my MPGs go up again. And when i take the step towards the header and exhaust ill look into the flange thing  :thumbsup:

Z, excuse the ignorance but why would i need a defouler?

The purpose of your O2 sensor (or secondary O2 sensor) is to measure the efficiency of your cat.  Without a cat, you'll probably get a P0420 code.  The defouler moves the O2 sensor out of the exhaust stream so you don't get that code.

Got it. Now my questions is, if the o2 sensor is out of the way wouldn't that bring me back to square one? Where the o2 sensor sends a bad reading to the ecu causing a bad fuel mixture and hurting gas milage again?

Edit: I just found the answer. The answer is NO, because by moving the o2 sensor out of the direct flow allows SOME gases to be read not all, which tricks the ECU into thinking that there is some resistance from what would be a catalytic converter which in reality is non existent.  

Thank you sir.

Right.  Gutting your cat, running a test pipe or even a high flow cat will make your ECU think that your cat is not working efficiently and you'll get the P0420 "low catalyst efficiency" code.  By using the fouler, you move the sensor out of the direct stream of exhaust flow and it tricks it to thinking you're cat is working.

I will buy the defouler and tackle this on Tuesday since I have two exams tomorrow. I will report back then. Thank you so much Tim.

How do you even gut a cat?

With a hammer and a metal pipe or something similar. Just break all the ceramic stuff thats in there and take it out in pieces.

that stuff inside your cat is worth $$
I just installed hfpc's and a hi-flo cat, took my old pre-cats and cat to a recycler and got $120...

That's why I say a test pipe is always best. It's not ceramic inside a stock cat though.

Yeah but think about it, you got 120 for two high flow pre cats and a high flow cat meaning you got around 40 for each. I only have one cat and a test pipe will run me at least 50 on egay. So i might as well just keep my oem cat and gut it, it will be dirtier and more DIY  ;D

I think it's platinum, that's why it's worth so much

If it were platinum people would be stealing cats left and right..

There's only a small amount of platinum.  Usually it's platinum, rhodium and unobtanium.

well i just called a few recycling places and apparently you need to show proof that you own it? so you have to show up with the title of the car and they have to see that it came from your car. I don't have the title to my car because i'm still making payments on it so the recycling thing is out of the question.   

Just show up with the car. They'll take it.

I took off the Cat to check if it was clogged, this is what it looked like. It didn't look clogged to me.

Outlet:

(http://i1306.photobucket.com/albums/s576/olecram93/IMAG0369_zps49dec9b5.jpg) (http://s1306.photobucket.com/user/olecram93/media/IMAG0369_zps49dec9b5.jpg.html)

Inlet:

(http://i1306.photobucket.com/albums/s576/olecram93/IMAG0367_zpsd10c545a.jpg) (http://s1306.photobucket.com/user/olecram93/media/IMAG0367_zpsd10c545a.jpg.html)


Either way, i ended up gutting it.
(http://i1306.photobucket.com/albums/s576/olecram93/IMAG0383_zps53662c8c.jpg) (http://s1306.photobucket.com/user/olecram93/media/IMAG0383_zps53662c8c.jpg.html)
(http://i1306.photobucket.com/albums/s576/olecram93/IMAG0395_zps186cc8dd.jpg) (http://s1306.photobucket.com/user/olecram93/media/IMAG0395_zps186cc8dd.jpg.html)

Just thought I'd post my gas mileage since I bought my car.

(https://dl.dropboxusercontent.com/u/13512054/Screenshot_2014-02-02-20-57-13.png)(https://dl.dropboxusercontent.com/u/13512054/Screenshot_2014-02-02-20-57-40.png)