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Chevrolet Cobalt Real World MPG

295 messages,  Last post on Nov 23, 2009 at 4:23 PM

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What is this discussion about? Chevrolet Cobalt, Fuel Efficiency (MPG), Coupe, Sedan

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#41 of 295 Disappointing MPG by brenner45 Feb 03, 2007 (7:46 am)
Bought my 2005 LS Coup 5-speed for $15K in June 2005. It now has 18.5K miles on it - it's my commuter car. I drive 52+ miles per day; some open highway, some stop & go city. Have NEVER gotten more than 28MPG! I've tried shifting with the in-dash shift light, which makes me feel like I'm driving with my grandma, and have abused it as well, it makes little difference. I know living 90 miles north of Philly, our fuel is full of additives, but it can't cause me to get 5 MPG less than everyone else is espousing on this forum. (We check the tire pressure and adjust once month.) For a light, peppy 5-speed, I'm not impressed. Replies to this message: cobaltken (Feb 03, 2007 12:22 pm) smogdung (Feb 21, 2007 5:13 pm)
#42 of 295 Re: Disappointing MPG [brenner45] by cobaltken Feb 03, 2007 (12:22 pm)
Replying to: brenner45 (Feb 03, 2007 7:46 am) What kind of airfilter do you have in your car?I have a SS Supercharger 2007 and I put a cold air intake kit on my cobalt with a K&N air filter,I gianed about 5 miles to a gallon more.If you dont want to spend the money for the whole kit you can just get the filter this will help.Also what octane gas do you us? If I put regular gas in my car I will also go to the part store and buy some octane boost this will also help. Let me know if you try any of these and if it helped your car.As for the shift light my car does NOT have one.
#43 of 295 Re: Disappointing MPG [brenner45] by smogdung Feb 21, 2007 (5:13 pm)
Replying to: brenner45 (Feb 03, 2007 7:46 am) I've put almost 70,000 miles on my 2.2L ecotec 5 speed 2003 Alero, it has smuck 60 series 15s, keep em at 32-35 psi. Have ave just a tick over 30 mpg. Not bad probably weighs a little more than a Cobalt. Wife's 2006 2.4L ecotec automatic HHR (50 series 17s) ave about 26 mpg over period of 14K miles so far. It weighs about 3,150 lbs. The 2.4L recommends premium, but runs just fine on 87 octane.
#44 of 295 Why is 30 mpg condsidered "good"????? by jhknight Mar 14, 2007 (2:43 pm)
Hey! Last I checked the automobile has been around with basically the same internal combustion engine for somewhere around 100 years!? And last I looked at the calendar it is the 21st century? I must therefore conclude that the only reason we are still stuck at a "good" 30 mpg after 100 years of same old technology that perhaps someone high up wants it that way?? Is that why a 2007 car gets WORSE mileage than it's predecesors?? I want a PRIUS !! At least it's a start in the right direction!! Replies to this message: okko1 (May 03, 2007 8:03 pm)
#45 of 295 Not bad or just good enough. by exzur2071 Mar 14, 2007 (4:46 pm)
The computer registered 27.7 mpg breaking-in my new Cobalt SS supercharged the first 611 miles.
#46 of 295 Re: Automatic [jaxs1] by steve333 Mar 18, 2007 (4:13 pm)
Replying to: jaxs1 (Sep 28, 2006 4:56 pm) I have a 2006 Automatic LT Sedan. When I first bought the car certified used I was getting 26.5MPG mixed driving. Now it just dropped below 25MPG I have never gotten anywhere near 30MPG even on the Freeway.
#47 of 295 Something is not right. by exzur2071 Mar 27, 2007 (4:46 am)
Last Friday I drove my Cobalt SS Supercharged from Grand Island, NY to Brooklyn, NY. The odometer shows 431 miles. Computer displays 32.1 mpg. Coming back yeaterday, the distance is also 431 but mpg drops to 30.8   Traveling the same route with my 2005 Corvette, the odometer shows 420 miles. My third car, a 2001 Pontiac Aztek on the same highways and byways, the mileage on the odometer is 421.   The mileage shown on the Cobalt SS Supercharged is 10 to 11 miles more than the other two cars.   The three cars has the original wheel and tire sizes.
#48 of 295 Disappointing Cobalt mileage. by 02cavalier Apr 02, 2007 (10:41 pm)
I had a 2006 Cobalt LS. 2 door automatic that I recently traded for a 2004 Impala. The Cobalt averaged 30.5 mpg no matter how much I babied it, and the Impala so far averages 30.1 mpg. I can't understand why a compact car only gets 30 mpg, where my 2002 Cavalier got 40 mpg on a trip, (but it was a 5 speed). I just couldn't see riding around in a cramped up compact when you can stretch out in a fullsize w/o a gas mileage penalty.
#49 of 295 www.fueleconomy.gov. by 02cavalier Apr 02, 2007 (10:43 pm)
BTW the Cobalt and the Impala are rated by the EPA for the same highway mileage (32) and having owned both cars seems to be accurate. If you keep your foot out of the Impala starting out and around town you will match the mileage of the Cobalt. My 2004 Impala has the 3.4 engine. Replies to this message: walterquint (Apr 05, 2007 4:59 pm) steve333 (Apr 05, 2007 5:49 pm)
#50 of 295 Re: www.fueleconomy.gov. [02cavalier] by walterquint Apr 05, 2007 (4:59 pm)
Replying to: 02cavalier (Apr 02, 2007 10:43 pm) You hint at a good point: the GM 6cyl pushrods are remarkably efficient. For example, the optional 6cyl in the Malibu is almost as efficient as the base Ecotec 4 (which is in the Cobalt).   The autobox in a 4cyl really sucks up power. 26mpg combined in a Cobalt autobox is a reasonable (if somewhat disappointing) expectation... Replies to this message: steve333 (Apr 05, 2007 5:49 pm)

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