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Sedans Chevrolet Cobalt Chevrolet Cobalt Real World MPG
295 messages, Last post on Nov 23, 2009 at 4:23 PM
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Replying to: timb24 (Apr 13, 2009 4:55 pm) Can you clarify this? I've been diligently monitoring MPG in my cars for years but could never correlate the results with the gas brand used. I prefer Shell, then perhaps Mobil/Exxon, then perhaps Sunoco, but this is all very non-scientific. Due you have any data demonstrating a certain gas brand's advantage? |
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Replying to: malexbu (Apr 13, 2009 5:38 pm) 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 (Harrisburg International, PA) 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 8000 on my current oil change (12200 miles total on the car: 08 Cobalt LS XFE) and the DIC oil life says 27%. Clean fuel, clean oil....... let me know if you get different results. Just an update to my milage results. Now that the weather has been warmer I have been getting no less than 36.3 mpg (combined driving) calculated as I fill the tank and not calculated by the car DIC. I drive the posted speed limit and try not to accelerate too heavily so I am not driving like Grandma. |
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Replying to: malexbu (Apr 13, 2009 5:38 pm) |
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Got 34 mpg, '09 Cobalt automatic, SF to LA. Usually commute mileage is around 29-30. |
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Replying to: malexbu (Apr 13, 2009 5:38 pm)
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Replying to: poncho167 (Apr 17, 2009 7:26 am) refinery, which is quite likely I mean no disrespect but I've seen not a single piece of data to support the claim that it is well known that the quality of a brands gas can be as much as 2-3 mpg. Different brand differ primarily, as far as I understand, in the composition of the fuel detergent added. This may have effect on the engine's health, long term, but it's not easy to change the amount of energy a gallon of gasoline produces. I do prefer to use a brand gas (will use no-name only rarely), but this is purely for the detergent. Would love to see the data showing the MPG advantage of a brand name. "Well known 2-3 mpg"... People refer to each other's words and an urban legend gets born. I could believe 1/2 mpg difference, but 3?.. Let somebody show the data, not perceptions. I watch my MPG like a hawk -- and here is my data: on a trip from TN to MA, I filled up at three gas stations: Shell, Sheetz, Citgo. The MPG (calculated as "the distance to the volume") for the three legs fueled by each was as follows: Shell - 36.8, Sheetz - 38.9, Citgo - 36.3. (This is for a 2005 Malibu with Ecotec 2.2L.) It's either Sheetz is brandier than the rest or... well, something else. |
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My Cobalt LS (4-door sedan) auto gets about 27 mpg average (mostly city driving) and gets about 31-34 mpg on hwy. I usually keep my tires at 32 psi as my door panel says 30 psi, is that bad for my tires. How can I get more mpg out of my car? Did change the spark plugs 3 weeks ago, and actually gave my car 1 mpg more when I start the engine.
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Replying to: pa356228 (Apr 19, 2009 9:48 pm) |
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Replying to: pa356228 (Apr 19, 2009 9:48 pm) By the way I see it, you should the one giving some advice instead of asking for some. I could add that a clean and well waxed car helps the m/p/g to. For your tire pressure, 32 p.s. i. isn't that bad but the ride must be a bit bumpy? |
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Yeah, the ride is a little bit bumpy, Should I just go by the door panel psi on tires for safe bet? I know I should be giving some advice. My only advice to give is to keep checking your tires and psi, and also change the oil, pcv valve and all filters every 3,000 miles. Pre-trips inspections is great for your car which can help you in the long run and also saves you costly repairs. Also, drive solo, really does give you more mpg and is easy on your car.
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