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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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#241 of 295 Re: Gas mileage ain't everything [laserblue] by poncho167 Jan 09, 2009 (4:54 pm)
Replying to: laserblue (Jan 03, 2009 2:33 pm) Yes, we just got the so called Smart car last year. The U.S. doesn't have the diesel model Smart like in Canada so its not that Smart as mentioned. It probably is considered micro but I was thinking of some smaller cars from Europe. The Mini Cooper used to be a micro car before it was made bigger for the U.S.
#242 of 295 37 mpg isn't BS by Kristen81 Feb 02, 2009 (12:11 pm)
I'm very impressed with the mpg on my 06 Cobalt. I've only had it a month, so I will have to manually average out the mpg and see how it matches up with the computer, as many have mentioned ...   ... But the computer shows me 35-37 on the highway. 26-27 is the lowest instant reading I've gotten, and that's for hilly in-town trips, with stoplights and turns every few minutes.   Over the holidays, before buying this Cobalt, we rented an 08 Cobalt to drive 600 miles each way. Got 37 mpg according to the rental 08's calculator.
#243 of 295 Where's my 37 MPG? by timb24 Feb 07, 2009 (6:40 am)
Just bought a new 09 Cobalt LT XFE w 5spd manual transmission 3 weeks ago. Have 600 miles on it. Filled up twice. DIC and manual calc says 30 MPG. Both tanks have been mostly highway miles. My commute to work - 2 miles to highway; 20 highway miles; 2 miles to office. So it's around 50 miles/day. To try and maximize MPG, I use the cruise at 65 mph. I also have been short-shifting to keep the rpms down and save a little more fuel. Even in town I run in 5th gear at 35-40 mph to keep the rpms down. Any thoughts? I'm very disappointed. I traded in a 95 dodge intrepid 3 liter 6 cylinder with 160,000 miles on it -- I was getting 28 mpg with that.   BTW, who's the chevy genius that designed the XFE 5th gear to run around 2400 rpm at 65 mph? There's no need for that on a level highway. I'd like to be running around 2000 rpm at highway speed and save some money. They should have added a 6th gear. Replies to this message: tsjay (Feb 07, 2009 5:39 pm) powderkegg (Feb 07, 2009 6:16 pm) timb24 (Apr 13, 2009 4:55 pm) malexbu (Apr 13, 2009 5:38 pm) powderkegg (Apr 14, 2009 5:45 pm) timb24 (Apr 15, 2009 4:52 am) poncho167 (Apr 17, 2009 7:26 am) and 1 more...
#244 of 295 accessories for cobalt ..help by kochise Feb 07, 2009 (3:21 pm)
Would like a website to purchase some side molding for my base model cobalt. Would like to pimp it up a little to make it look like a ss version. (I wish) thanks
#245 of 295 Re: Where's my 37 MPG? [timb24] by tsjay Feb 07, 2009 (5:39 pm)
Replying to: timb24 (Feb 07, 2009 6:40 am) That's a bummer, timb24. It doesn't take much in-town driving to pull down your mileage, but I would still expect you to do better than 30 MPG with the driving mix you have described.   Try something, if you are willing. Get leveled off at 65 MPH and set your cruise control, as you say you do routinely anyway. Reset the average MPG (average, not "instant") on the DIC to zero and keep an eye on it. See what it is showing when you finally have to get back on city streets. I would think steady cruising at 65 MPH should get you something very close to the advertised 37 MPG.   Tom
#246 of 295 Re: Where's my 37 MPG? [timb24] by powderkegg Feb 07, 2009 (6:16 pm)
Replying to: timb24 (Feb 07, 2009 6:40 am) I've read in other parts of this forum and other magazines that short shifting and under-accelerating will negatively impact your gas milage. I have an 08 cobalt xfe and have gotten 42 mpg during my trip. That including resetting the DIC when I fueled the vehicle and about 5 miles of non interstate driving before I entered the interstate. I don't get that all the time, but it just shows that it is possible.   Another interesting bit of information and take it for what it is worth. I always use sunoco gasoline. I am a firefighter at an airport and happened to be having a conversation with the manager of the aircraft fueling station. We were talking about fuel prices and etc and he stated without prompting that Sunoco fuel is the best fuel on the market. They are not affiliated with any brand of fuel. He took me down and showed me samples from thier fuel tanks; some was sunoco and some was not. The Sunoco fuel looked almost clear, just like real good moonshine! Anyhow, I've been running a little bit of a test. I switch the fuel in my girlfriends car from time to time. She is not as particular with her fuel (she get's whatever is cheaper). I will fill her tank and not tell her where I got the fuel so she doesn't alter her driving. The Sunoco tanks always always always get 3 to 4 miles a gallon better than any other fuel. Try it out and see what happens. It may impact your oil life as well. I've got over 5000 on my current oil change (9200 miles total on the car) and the DIC oil life says 56%. Clean fuel, clean oil....... let me know if you get different results.
#247 of 295 Real Mileage by boodrow Feb 17, 2009 (2:11 pm)
To calculate accurate mileage fill your tank to the brim, drive, fill to the brim again and divide by miles traveled. Most built in estimates by your car's computer is just plain wrong. They will give you an estimate but it is only an estimate. I would think that 37 mpg is within easy reach on a hiway trip in warm weather traveling under 70 and driving like you have a raw egg under your throttle foot. Replies to this message: laserblue (Feb 17, 2009 4:38 pm) powderkegg (Feb 17, 2009 6:03 pm)
#248 of 295 Re: Real Mileage [boodrow] by laserblue Feb 17, 2009 (4:38 pm)
Replying to: boodrow (Feb 17, 2009 2:11 pm) The car computer actually calculates your average m/p/g of the last hour of driving. When I want to know for sure, I do the same thing as you to get an accurate reading. I fill the tank to the rim, I even rock the car and fill it until I see the gas and it stays there so the neck is also full of gas and on the 2nd fill I do the same thing and then I make my little calculations... miles driven / gal. of gas.   That's the only accurate way to do it. If you stop the pump when it clicks, that no good.
#249 of 295 Re: Real Mileage [boodrow] by powderkegg Feb 17, 2009 (6:03 pm)
Replying to: boodrow (Feb 17, 2009 2:11 pm) I always calculate my own milage... that's something we were taught how to do when I was in math class way back in elementary school.... the computer always reflects differently (usually lower) than what I get.   Your skeptical demeanor is a little on the side of I don't like how you're talking to me. If that's not what you meant, that's fine no foul. Don't assume that everyone on here is an idiot.
#250 of 295 Re: First Highway mileage [Amunhotep] by Amunhotep Apr 13, 2009 (7:30 am)
Replying to: Amunhotep (Dec 28, 2008 12:19 pm) I now have about 4700 miles on the Cobalt and have seen little improvement in mileage. I have been averaging around 24 in mixed highway/city driving. I just returned from a long highway trip, around 400 miles in 98% highway and got 29 mpg (not computer average but miles divided by gallons). Still a little disappointing, but the car rides well, quiet and steady. I am beginning to think that the larger tires (16" w/ machine face aluminum wheels) may have something to do with the mileage. I use a light foot for acceleration, use the cruise control most of the time and watch my braking. I hope that improvement may come in the near future.

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