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It's a lot more than just cD. It's also frontal area, gearing, tire RR and inflation pressure, ambient temperature, air density, etc. My 2012 Elantra with .25 cD will get ~44 mpg @ 60 mph. A Prius with the same .25 cD will get 60 mpg @ 60 mph.
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Darrell
Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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