Quote:
Originally Posted by mush3gan
does lower RPM equate to higher MPG?
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Not always. Many cars cutoff the injectors when coasting and allow the wheels to turn the engine at say 2000 RPM while using no fuel, but if at the same speed you shift to neutral and disconnect the wheels from the motor you still have to use fuel to keep the engine running at about 750 RPM. In this case you are actually using more fuel at a lower RPM.
Thats a special case though, in most instances lower RPM=higher MPG