Is 27mpg Bad? - 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 31 (permalink) Old 06-25-2010, 07:26 AM Thread Starter
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Is 27mpg Bad?

I read about some of you guys getting way more than 27mpg, but that is what my car is reading on the DIC. What could be wrong?

It's an 07 2.4L NA with 8100 miles. Seems to run good, plenty of power but I don't really drive hard. Mostly highway driving, 26 miles per day round trip.


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post #2 of 31 (permalink) Old 06-25-2010, 07:28 AM
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hwy or city?
speed?
road conditions? (perfect day out? uphill mainly?)
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post #3 of 31 (permalink) Old 06-25-2010, 07:41 AM
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Really all depends too how the air glides over the car, I would say wash and wax your car, that will give you about 1-2mpg, actual number too. The DIC isn't always right either, add up your miles on a full tank and divide it by 12, that will give you actual average mpg. Are you using air conditioning during this time?

Mike I would assume that it is all around hwy and city seeing as it is DIC reading and the car's computer knows no difference.

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post #4 of 31 (permalink) Old 06-25-2010, 07:46 AM Thread Starter
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Yeah, mostly highway...it's 13 miles one way and only 2 red lights. I'll have to manually compute next time I fill up because it just seems low. My 91 Taurus with 3.8 V6 got 23 mpg!


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post #5 of 31 (permalink) Old 06-25-2010, 07:46 AM
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this is true. seems like your mileage is fairly normal though because i was just up in PA and its a lot of up, then down, left, then right, then down, then up, then flat...stay flat...UPPPPPPPPP dowwwwwwwn kind of roads lol
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post #6 of 31 (permalink) Old 06-25-2010, 07:57 AM
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The way i figure out MPG is fill up the tank and zero out the trip odometer. Then next time you add fuel take miles on the trip and divide by gallons of fuel added. Example 200 miles driven and 10 gallons added=20 MPG (EXAMPLE ONLY). That will get you as close to a real MPG figure as you can get. AS stated above the DIC is not perfect.



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post #7 of 31 (permalink) Old 06-25-2010, 09:43 AM
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yeah I get about 27-33ish mpg, theres sooooo many variables I wouldnt worry about it man, seems like a pretty avg mpg rating for the 2.4

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post #8 of 31 (permalink) Old 06-25-2010, 10:20 AM
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Okay, now I'm just gonna jack your thread here for a minute...

Now when you guys say you determine the miles on a full tank, how do you guys determine when your tank is "empty"? Do you stop when you get the "low fuel" warning or do you guys literally run it till the engine dies and the tank is totally dry?

I would kinda like to know this, since it wouldn't be a good idea for me to run out of fuel on the road.

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post #9 of 31 (permalink) Old 06-25-2010, 10:22 AM
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Consider yourself lucky, I'm usually stuck around 21-22 MPGs.

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post #10 of 31 (permalink) Old 06-25-2010, 10:25 AM
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Quote:
Originally Posted by HTx View Post
Consider yourself lucky, I'm usually stuck around 21-22 MPGs.

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