Need to Know the MPG for the 2.2 LT - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
All about MPG All about maximizing your Miles Per Gallon (MPG)

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post #1 of 49 (permalink) Old 10-18-2009, 09:41 PM Thread Starter
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Cool Need to Know the MPG for the 2.2 LT

There seems to be a problem with the mpg I am getting . The dealer tells me I am to get around 25 MPG .Have seen on GM's web site it is 29 MPG . But all I am getting is 16 MPG. Had it in for service and was told because there is ethanol in the gas I am using that is the reason for the low mpg. I don't see where that would make a big differance . I thing the dealer knows there is something wrong and dose not wont to fix it until the warranty is over.
If the 2009 Cobalt LT get's this bad mpg then Chevy better go back to rethinking the whole thing over.
I have a Mustang that is 26 years old and still get 32mpg.
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post #2 of 49 (permalink) Old 10-18-2009, 09:44 PM
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my 06 LT coupe gets 32 average and I drive pretty quickly
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post #3 of 49 (permalink) Old 10-18-2009, 09:47 PM
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got a 2.2L LS, and average like 30 w/ mostly city driving. what percent ethanol is in your gasoline? our cars arent built for stuff like E85. E10 tops. I believe thats what most gas is now anyways

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post #4 of 49 (permalink) Old 10-18-2009, 09:56 PM
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I got like 27-30 in half stop and go, half freeway (but only like 5 miles of freeway at a time) in the summer, then like 23-25 in the winter, when I was stock.

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post #5 of 49 (permalink) Old 10-18-2009, 10:37 PM
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Quote:
Originally Posted by MP81 View Post
I got like 27-30 in half stop and go, half freeway (but only like 5 miles of freeway at a time) in the summer, then like 23-25 in the winter, when I was stock.
same but more like 25-28 in town and low 30's highway



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post #6 of 49 (permalink) Old 10-18-2009, 10:40 PM
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Quote:
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same but more like 25-28 in town and low 30's highway
what engine do you have? cause with just a SRi, i was getting 38mpg at 70mph...mind you it was perfectly level road and i was maintaining a constant speed

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Mods: MB SevenX 16" rims, painted bowtie, 350 Watt Kenwood amp and JL Audio sub, Red Razo sport pedals, K&N SRI, PPE Engineering header and downpipe, Tsudo exhaust, coupe style wing (yes! that's it...for now)

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post #7 of 49 (permalink) Old 10-18-2009, 10:44 PM
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2.2 I've never gotten as good mileage as anyone else. IDK why. The best I saw was an hour long highway ride, with shell gas, I got 35-37ish.



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post #8 of 49 (permalink) Old 10-19-2009, 03:38 AM
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I believe some of the 09's are E85 capable...if you have E85 in your tank and your car is capable of using it, then 16 (even though a little low still) isn't too far off....E85 isn't going to give the same kind of mileage that regular 87 will...there's a reason it's cheaper at the pump.


Did a little more research real quick...it looks to me that only the HHR has a E85 capable version of the LAP engine...it's listed as LE8. Unsure if they used these in the Cobalt's. I am thinking they didn't. OP, can you explain what the dealer was saying when they said Ethanol in the gas? Were they talking E85 or were they just saying Ethanol in the gas (because the latter is not uncommon for any gas).

Please come back and clarify a few things. Thanks.

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Last edited by 07CobaltLS; 10-19-2009 at 03:42 AM.
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post #9 of 49 (permalink) Old 10-19-2009, 08:23 AM
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Most gas has a certain amount of Ethanol in it already, like 10%.

E85 is 85% ethanol, 15% 87-octane gasoline.

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1986 Chevrolet Camaro IROC-Z - Wrecked/Sold
1998 Chevrolet Cavalier - Wrecked/Donated
2007 Chevrolet Cobalt LT - M62 Supercharger, Ported Throttle Body, 42 lb/hr Injectors, Intense 2.9" Pulley, Cobra Heat Exchanger, SS/TC Exhaust, TTR Engine and Trans Mounts, Trifecta Tune, ZZP Header and Downpipe, '08+ FE5 Struts/Shocks, SSC Springs, FE5 Control Arms, SS/SC Front Swaybar, Powell Hardcore Rear Swaybar, 18" MSR 045s, Dunlop ZIIs, Nightshaded Tails/Side Markers, Shorty Antenna, Black Bowties, Black Grilles, Black Headlights, Dual JL 12" w1v2 Subs, A/D/S Front/Rear Speakers, Pioneer 7" Touchscreen, G85 Recaros, Leather Rear Seats, 160 MPH Cluster.
2014 Chevrolet Cruze Diesel - 17" MSR 013s, Black Bowties, Black Tails, UR Rear Lower Bar
1981 Chevrolet Camaro Z28 - JVC Ribbon Tweeters, SEAS Mids, Pyle Woofers, Kenwood Tape Deck, Zapco Amp/Equilizer, Ceramic-Coated Longtubes, 2.5" Pypes Stainless Exhaust, Bilstein B6 Shocks, GW U/L Control Arms, Hotchkis Springs Sway Bars, DD HDX Cluster
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post #10 of 49 (permalink) Old 10-19-2009, 09:34 AM
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i think it all depends on how ur driving, is urs auto or standard, u get better gas mileage with a standard

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