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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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#274 of 295 2007 Chevolet Cobalt MPG by gigimj May 22, 2009 (10:36 am)
Just wanted to comment ... I drive 75-80 miles round trip to work daily in city/hwy traffic in Dallas/FtWorth .. I average 32-33 mpg. I have a Cobalt sedan 2007. My daughter has a Cobalt coupe 2007. I just took a trip to Houston last weekend driving 60 mph with no AC on with some rain and averaged 41.3 mpg with an average speed of 57 calculated by the onboard computer in the car. When I first got the car I went to Atlanta GA and averaged over 37 mpg I remember. The car has 45,000 plus miles on it now and 2 yrs old .. yes I drive a lot! I just had the car inspected, oil and oil filter changed, all new tires, new fuel filter, new air filter, and new wiper inserts. I'm driving to Houston again this weekend ... hoping for even better milage this time ... maybe better then 42 mpg!!! Anyway just wanted to say how impressed I am with this Cobalt ... bought it new 2 yrs ago a week after my daughter bought her coupe. I'm 62 nearly and have owned a lot of cars in my time. Once I would not go near a Chevolet ... that has changed! I have had in my lifetime a 1966 Olds Cutlass 442, 1967 Corvett, 1968 Corvett, 1972 Toyota Celica, 1973 Toyota Corona, 1974 Toyota Corona, 1976 Fiat, 1977 Buick Regal Tubo, 1978 Audi 2000S, 1980 Mazda RX7, 1982 Honda Accord, 1985 Ford F250 HD SuperCab Diesel, 1988 Mitsubishi Pickup, 1994 Jeep Cherokee, 1998 Ford EddieBauer Explorer which I still have with just over 149,000 miles and my 2007 Chevy Cobalt. All these vehicles were bought new from first to last. My 1966 442 got 17 mpg, my 1972 Celica got better then 32 mpg, and my Chevy Cobalt better then 41 mpg .... yeaaaaa!   How are the rest of you doing with the Cobalt??????   Thanks Gigi
#275 of 295 Re: Automatic [jaxs1] by dft56 May 31, 2009 (11:38 pm)
Replying to: jaxs1 (Sep 28, 2006 4:56 pm) I have a 2007 LS 4dr sedan and live in NY, around town i get 29mpg and on long trips between 38-42mpg. Am quite happy with my Cobalt despite a few trips to the dealer for front end work(all under warranty). Seems the bushings are not as good as they used to be. Replies to this message: steve333 (Jun 01, 2009 6:43 am)
#276 of 295 Re: Automatic [dft56] by steve333 Jun 01, 2009 (6:43 am)
Replying to: dft56 (May 31, 2009 11:38 pm) Hi, My front end feels funky, I was wondering what your front end symptoms were when you got the bushings replaced. Thanks.
#277 of 295 good MPG by pvs68 Jul 27, 2009 (4:55 pm)
#278 of 295 Good MPG by pvs68 Jul 27, 2009 (4:57 pm)
I just rented a Pontiac GS (Identical to Cobalt) and according to the in car computer was getting 38 MPG on the highway with spirited driving from NC to ME and back, more than 2500 miles. This was with an automatic transmission too! I was impressed since it zipped along too.
#279 of 295 killer MPG by happycamper6 Aug 08, 2009 (8:11 pm)
Picked up my 09 Cobalt LS/XFE with the five speed a little over a week ago, and have no problem getting 43 to 44 on the freeway. Doing 70 in fifth, with the A/C on. This little car amazes me.
#280 of 295 Updated my Mpg, Cobalt LS by pa356228 Aug 20, 2009 (8:45 am)
Now, I've being alittle mixture of driving on the Interstate and city. My Cobalt LS is averaging out 31.4 mpg. It was 32.4 but right now my cobalt is about 3,000 miles overdue and will definitely get an Oil Change tomorrow morning (08/21/2009) so, hopefully the mpg will raise back up. Also, my tires are set at 32psi. By the way, my car is automatic, wished I had a 5 speed. Although, I do know how to drive a 10 speed BigRig.
#281 of 295 59 mpg? by innyrightnow Oct 02, 2009 (6:27 am)
I rented a Cobalt in 2007 and played around with various speeds/rpms to see what produced the best MPG (according to the car computer), and found that if I activated the cruise control, while accelerating, right after it switched to the highest gear (4th?), the speed would be maintained at about 38 or 39 mph, and the MPG would register at 58 or 59 mpg. This was when the tires were a little over-inflated (a hot day), and on a very smooth pavement. I watched the mpg drop by 4 or 5 mpg when the road surface changed to very rough (the kind of road that is very loud to drive on). My question is, is the car computer readout of mpg accurate? (if I actually drove a few hundred miles with this setting, and measured the gas comsumption, would the reported mpg have calculated out to be true?) The reason I ask is that I am considering buying a Cobalt, and want to know if the computer mpg is accurate. Replies to this message: elias (Oct 02, 2009 9:05 am) powderkegg (Oct 02, 2009 12:50 pm)
#282 of 295 Re: 59 mpg? [innyrightnow] by elias Oct 02, 2009 (9:05 am)
Replying to: innyrightnow (Oct 02, 2009 6:27 am) Car dashboard mpg computers/displays are not very accurate in my experience - often reporting much more mpg than the car is actually getting. So no, had you measured distance/gallons, you would have come up with a substantially lower number. Maybe 39 mpg at most, I'd guess. But any given mpg-meter tends to be accurate for measuring *relative* mpg differences within that one vehicle. So when you saw indicated mpg drop from 58 mpg to 54 mpg, you can be pretty sure that the instantaneous fuel consumption had indeed dropped by ((4/58)*100) %. Once you establish the "overestimate" that the dashboard-mpg-meter provides, you can subtract a fixed percentage from whatever it tells you. For example, my VW TDI mpg dashboard-computer reads consistently about 10% above the actual mpg, typically reporting 50 mpg over an entire tank that actually yielded 45 mpg. Replies to this message: powderkegg (Oct 02, 2009 12:50 pm)
#283 of 295 Re: 59 mpg? [elias] by powderkegg Oct 02, 2009 (12:50 pm)
Replying to: elias (Oct 02, 2009 9:05 am) In my 2008 the car keeps very good track of the gas mileage. Keep in mind that the MPG displayed in the DIC is only representative for the last hour of driving. So you may have done 200 miles of highway at 35 mpg and 100 city, heavy stop and go and the car may display 28 or less. But when you fill the tank you will most likely see that you actually got 31 or 32 mpg for the whole tank. For a 300 mile trip from Central PA to Western NY I generally get 34 to 35 mpg. That's a lot of mountains as I venture north at 65 or 70 mph. I keep my tires at 30 psi cold as the car recommends. I have 19000 miles on my car and keep track of every drop of gasoline that the car consumes. My average since I bought the car is 33 mpg.

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