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[nookandcrannycar]

Originally Posted by bronsin

Actually as long as the highest gear ratio (ie 4th in a four speed, 6th in a six speed) are the same so will the mileage be. And because you are winding through the gears (and burning gas as you do so) the more speeds the transmission has the worse the mpg.

Thus the most efficient transmission is a three speed NOT a six speed.

Get it?

I was going by a general assumption that the set up on a 6-speed vs a 5-speed (on average) would allow the 6-speed to be at a lower rpm (and likely higher MPG) than the 5-speed at the same MPH.

If one wound through the gears ALWAYS at a low rpm (trying to get to 5th or 6th as quickly as possible without 'bogging'), wouldn't the diminished efficiency of more gears to 'row'/'wind' through be minimal, or almost non existent ?