Quote:
Originally Posted by HypermilerAX
A powerful, aero and short-geared car will work best. An underpowered car and/or with very high gearing will work less.
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I can confirm this too with the Firefly/Metro and its taller final drive. The P&G highway advantage is
much smaller.
Which is fine with me, because I prefer to just cruise (drive with load/target drive) on highway trips. (Though I still use it strategically depending on terrain, speed zones, etc., on a given trip.)