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Old 05-01-2009, 03:30 AM   #30 (permalink)
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Join Date: Dec 2007
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1999 Saturn SW2 - '99 Saturn SW2 Wagon
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basjoos -

Originally Posted by basjoos View Post
One way you can determine your car's potential mileage increase via aerodynamic drag reduction is to notice what your mileage increase is when you are drafting another vehicle. Since when drafting, the only thing that has changed is the reduction in wind drag and its effect on lowering your engine's loading (rolling resistance and engine rpm's are unchanged), the mileage you get while drafting is the mileage you could get by lowering your car's Cd.

The Cd on my car is now so low that drafting results in little change to my car's mileage.
I never thought of this. This is good to know for strategic aero-testing.


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