Fuelly Tip

50/50 Rule

As the television show Mythbusters has proven—when traveling under 50 MPH it is more fuel-efficient to leave your windows down and your AC off. When traveling over 50 MPH it is more fuel-efficient to have your AC on and your Windows up.
by TikiTantrum on August 10 2008
this tip works for 90% of voting Fuelly members.



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