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Old 03-09-2011, 01:36 PM   #8 (permalink)
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Colorado - '17 Chevrolet Colorado 4x4 LT
90 day: 23.07 mpg (US)
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Originally Posted by Old Tele man View Post
...from the 2011 EPA Fuel Economy website:

2011 HHR FFV M5 2.4L/4 22/30 GAS
2011 HHR FFV M5 2.4L/4 16/23 E85

...thats a 17% FE reduction in city-FE and a 13% reduction in highway-FE values.
That's because the engine cannot change it's compression ratio to take advantage of the higher octane fuel.
I'm not coasting, I'm shifting slowly.
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