Quote:
Originally Posted by SolsticeGXPWOW
I had heard about that change, but did other cars really reflect as bad as the Solstice and why has it gone back up 2mpg. Do you believe it should be back around 29-31?
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Most vehicles showed a significant change in mileage from 07 to 08... although since it is based on the test cycle some changed more than others.
Here is a link that describes the changes.
2008 Fuel Economy Tests
One example is the 2007 GXP with manual tranny. The old system would have had it rated at 25 combined, 22/31 city/highway. The new system would have it at 22 combined, 19/28 c/h.
Not sure why you think it went up, since the 2009 is also rated 22 combined, 19/28 C/H. Maybe it was one of the other drivetrains?
