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Old 06-01-2012, 01:16 PM   #52 (permalink)
rmay635703
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Join Date: Jun 2008
Location: Somewhere in WI
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Silver - '10 Chevy Cobalt XFE
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Quote:
Originally Posted by Xringer View Post
Did a fill-up to and got Fuelly..

At 318 miles, it needed 5.5 gallons, giving 57.8 MPG (if the dealer gave us a good fill-up).
The odometer display shows 64.3 MPG. Close to an 11% error..?.
We'll see how close it is, after the 400+ road trip this weekend.
That's going to be 97% highway at 65 ish.. I hope, since I'm not going..
My experience is the smaller the fuel tank the more tank to tank variation you get, the only exception is the subaru 360 I have as you can clearly visually see the fuel in the 6.6 gallon tank and top off to the same spot most every time.
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