Bad MPG? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

harrington81 · 11-26-2010, 08:55 PM

Hi there. I just wanted to ask u guy's a couple questions about my 2010 2ss, 6speed. Right now i average around 12.5-14 MPG city and very light on the pedal. I did a second fuse pull about 2 months ago and my MPG dropped way down. I took it the dealer to get it scanned and they said it was fine. So i tried a 3rd fuse pull and the next morning the car got way better fuel mileage 20MPG . I left it for 2 days then started it up took it for a drive and the mileage went right back to normal 12.5-14 MPG. I think my car might be reseting it's self back to the low octane table which is why i'm getting horrible fuel economy. I only use premium fuel. Does anybody know whats going on. Why isn't it getting 17-20 MPG like it should. I hope this makes sense.

Thanks for the help!

mth35115 · 11-26-2010, 09:03 PM

City driving depends alot on how many stops(traffic lights and stop signs i.e.) you make and how long your stopped. Mileage while idling at a stop gives you 0 mph averaged in with your moving mph.

The Stig · 11-26-2010, 09:20 PM

could also check your tire pressure, if its low could be the reason

KEEP RT · 11-26-2010, 09:33 PM

I only the brand name gas. And usually the same stations. Inexpensive gas costs more in the long-run. How many miles on your oil, airfilter, what RPM are you crusing at? All things to consider.

harrington81 · 11-26-2010, 10:53 PM

Hi there. My tire pressure is fine i check it regularly (36 psi) cold. I only use Chevron (94 octane). I changed my oil at about 1000 KMS and i'm currently at 2550 kms. So my car is still brand new. My air filter is the one that came with car. I think my cruising RPM is normal around 2000 grand. Is 12.5 MPG bad because i've seen this car get 18+ MPG city before?

KEEP RT · 11-26-2010, 11:17 PM

something isn't right.. I'm at 20 mpg U.S. gal. city (with a little fun) and 26.5 Hwy. I'd go back to the dealer. Maybe fuel leak? IDK sorry. Let us know when you find out.

briancb1 · 11-27-2010, 12:33 AM

I have a 6.0 GTO M6 and if I'm trying really hard, I get 29-30 highway and I can average it out to about 23 mixed street with highway.

Its all about knowing when to let off the gas and let it coast my friend.

harrington81 · 11-27-2010, 01:03 AM

trust me i absolutly baby this thing. I don't drive it hard. Once in a while i'll get on her for sure but i ain't flooring it everywhere. I have a LT1 4th gen that get's about the same or better fuel economy. 12.5 MPG is not good. I guess i'll get it looked at again.

TaylorRyanSS · 11-27-2010, 03:12 AM

I get about 13 mpg as well. I am not too hard on the gas, but I like to get on it every once in awhile.

Phase V · 11-27-2010, 05:17 AM

there's gotta be something wrong cuz I get like 19 on the street and on base. but on the highway I can get up to about 30. I think 17mpg was the lowest i've gotten without getting on it

Slowhawk · 11-27-2010, 08:21 AM

If you have a good tuner up there have them log a file on the car. That will let you see what the timing , A/F is doing. I've had some 2010's come here with totally screwed up factory tunes.They ran fine but the fuel,timing was wrong.We gained good MPG retuning them.

Agent WD-40 · 11-27-2010, 02:42 PM

I'm getting around 13 MPG right now (mixed city and highway- probably a bit more city though). I wonder if the cold here has something to do with this (and winter fuel). I'm not constantly romping on it either. I do have long tube headers, exhaust, a cam and tune on an L99. I hope it gets better as it warms up though.

My long term fuel trims are reading 5-6% so I don't think that is too far out of whack given what I have seen others with LT headers posting.

hp junkie · 11-27-2010, 03:01 PM

I have an average of 17.2 mpg with mixed city and highway. I drive my car very hard and it has a couple mods.

FRANK121 · 11-27-2010, 04:39 PM

12-14mpg city driving here?

Now I have a canned tune, would it be better to have it tuned on a dyno?

I have a good tune from Jannetty but it may be my driving? I did take it easy for a couple of days and got 14 .... no where near 17 though!

11-26-2010, 08:55 PM	#1
harrington81 Drives: 2015 Camaro zl1 Join Date: Aug 2010 Location: British Columbia, Canada Posts: 91	Bad MPG? Hi there. I just wanted to ask u guy's a couple questions about my 2010 2ss, 6speed. Right now i average around 12.5-14 MPG city and very light on the pedal. I did a second fuse pull about 2 months ago and my MPG dropped way down. I took it the dealer to get it scanned and they said it was fine. So i tried a 3rd fuse pull and the next morning the car got way better fuel mileage 20MPG . I left it for 2 days then started it up took it for a drive and the mileage went right back to normal 12.5-14 MPG. I think my car might be reseting it's self back to the low octane table which is why i'm getting horrible fuel economy. I only use premium fuel. Does anybody know whats going on. Why isn't it getting 17-20 MPG like it should. I hope this makes sense. Thanks for the help!

11-26-2010, 09:03 PM	#2
mth35115 Drives: 2010 Camaro rs/ss inferno orange Join Date: Mar 2010 Location: Birmingham, AL Posts: 232	City driving depends alot on how many stops(traffic lights and stop signs i.e.) you make and how long your stopped. Mileage while idling at a stop gives you 0 mph averaged in with your moving mph. __________________ HOT ROD SS MTH35115

11-26-2010, 09:20 PM	#3
The Stig knows 2 facts about ducks Drives: ...and they're both wrong Join Date: Aug 2009 Location: The HMS Invincible Posts: 25,072 View My Garage	could also check your tire pressure, if its low could be the reason __________________

11-26-2010, 09:33 PM	#4
KEEP RT Wonderfully Awful Idea Drives: 2010 2SS/RS Join Date: Aug 2010 Location: Battle Ground, WA Posts: 1,456 View My Garage	I only the brand name gas. And usually the same stations. Inexpensive gas costs more in the long-run. How many miles on your oil, airfilter, what RPM are you crusing at? All things to consider. __________________

11-26-2010, 11:17 PM	#6
KEEP RT Wonderfully Awful Idea Drives: 2010 2SS/RS Join Date: Aug 2010 Location: Battle Ground, WA Posts: 1,456 View My Garage	something isn't right.. I'm at 20 mpg U.S. gal. city (with a little fun) and 26.5 Hwy. I'd go back to the dealer. Maybe fuel leak? IDK sorry. Let us know when you find out. __________________

11-26-2010, 10:53 PM	#5
harrington81 Drives: 2015 Camaro zl1 Join Date: Aug 2010 Location: British Columbia, Canada Posts: 91	Hi there. My tire pressure is fine i check it regularly (36 psi) cold. I only use Chevron (94 octane). I changed my oil at about 1000 KMS and i'm currently at 2550 kms. So my car is still brand new. My air filter is the one that came with car. I think my cruising RPM is normal around 2000 grand. Is 12.5 MPG bad because i've seen this car get 18+ MPG city before?

11-27-2010, 12:33 AM	#7
briancb1 Drives: C6 Z06 Join Date: Nov 2010 Location: Houston TX Posts: 109	I have a 6.0 GTO M6 and if I'm trying really hard, I get 29-30 highway and I can average it out to about 23 mixed street with highway. Its all about knowing when to let off the gas and let it coast my friend.

11-27-2010, 01:03 AM	#8
harrington81 Drives: 2015 Camaro zl1 Join Date: Aug 2010 Location: British Columbia, Canada Posts: 91	trust me i absolutly baby this thing. I don't drive it hard. Once in a while i'll get on her for sure but i ain't flooring it everywhere. I have a LT1 4th gen that get's about the same or better fuel economy. 12.5 MPG is not good. I guess i'll get it looked at again. Last edited by harrington81; 11-27-2010 at 01:28 AM.

11-27-2010, 03:12 AM	#9
TaylorRyanSS COTW: 12/13/10 Drives: 1969 Camaro Join Date: Feb 2008 Location: Orange County, CA Posts: 7,880	I get about 13 mpg as well. I am not too hard on the gas, but I like to get on it every once in awhile. __________________ "Are you one of those boys who prefer cars to women? - I'm one of those boys that appreciates a fine body, regardless of the make." 1969 CAMARO JOURNAL: http://www.camaro5.com/forums/showthread.php?t=341239 \| FACEBOOK: http://www.facebook.com/taylor.ryan.apt \| GRAPHIC DESIGN: www.aptdesigns.net

11-27-2010, 05:17 AM	#10
Phase V Summer Drives: 2010 2SS/RS IOM w/ Black Stripes Join Date: May 2009 Location: San Angelo, Texas Posts: 423 View My Garage	there's gotta be something wrong cuz I get like 19 on the street and on base. but on the highway I can get up to about 30. I think 17mpg was the lowest i've gotten without getting on it __________________ CAI intake, Rotofab W/W Reservoir, Hurst Shifter, Skip-Shift Eliminator AAC lighting, Kooks LT headers w/ high flow cats and Borla ATAK cat-back Restoring or need parts for a Chevy. Look no further than Don's East Coast Restorations

11-27-2010, 08:21 AM	#11
Slowhawk Drives: 1999 Trans Am Join Date: Jul 2009 Location: Bridgewater,Ma Posts: 2,017	If you have a good tuner up there have them log a file on the car. That will let you see what the timing , A/F is doing. I've had some 2010's come here with totally screwed up factory tunes.They ran fine but the fuel,timing was wrong.We gained good MPG retuning them.

11-27-2010, 02:42 PM	#12
Agent WD-40 Drives: 2010 Camaro SS Join Date: Oct 2010 Location: MI Posts: 601	I'm getting around 13 MPG right now (mixed city and highway- probably a bit more city though). I wonder if the cold here has something to do with this (and winter fuel). I'm not constantly romping on it either. I do have long tube headers, exhaust, a cam and tune on an L99. I hope it gets better as it warms up though. My long term fuel trims are reading 5-6% so I don't think that is too far out of whack given what I have seen others with LT headers posting. __________________ L99 - 440 RWHP Livernois 2c Cam & VVT/DOD Delete Roto-Fab Intake Stainless Works 1 7/8" Long Tube Headers Corsa Exhaust

11-27-2010, 03:01 PM	#13
hp junkie Drives: 2010 2SS/RS CGM Join Date: Apr 2010 Location: Waukesha, Wi Posts: 129 View My Garage	I have an average of 17.2 mpg with mixed city and highway. I drive my car very hard and it has a couple mods. __________________ 2010 2SS M6 CGM LMR cold air, texas speed underdrive pulley and complete stainless exhaust 17/8 headers coated, comp LSR cam, push rods and trunion upgrade, norris catch can, prothane engine mounts, pfadt coilovers, BMR everything suspension, BMR four point strut, MGW billet shifter, barton pistol grip handle, AAC dome and footwell blue, all lights 25% tint, RKsport carbon inlay spoiler, powdercoated calipers, Stoptech stainless brake lines, Hawk HPS pads, West Bend Dyno tune 491rwhp and 465rwtq corrected.

11-27-2010, 04:39 PM	#14
FRANK121 Drives: 2022 Camaro ZL1 Join Date: Sep 2010 Location: Sullivan, Missouri Posts: 653 View My Garage	12-14mpg city driving here? Now I have a canned tune, would it be better to have it tuned on a dyno? I have a good tune from Jannetty but it may be my driving? I did take it easy for a couple of days and got 14 .... no where near 17 though! __________________ 2022 Black ZL1 RotoFab CAI, AWE Touring Edition Cat Back Exhaust. 665 Crank hp. est. and 660 Crank ft. lbs. est. Never been Dynoed

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