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gone-ot · 08-21-2012, 06:02 PM

...an overdrive "shifts" (pardon the pun) the engine RPM's at highway speeds down into the 'slower' 1000-2000 RPM range where the engines' SFC is "least" for "power" produced, ie: the "best" fuel-economy area of the engine operation.

08-21-2012, 06:02 PM	#8 (permalink)
gone-ot ...beats walking... Join Date: Jul 2009 Location: . Posts: 6,190 Thanks: 179 Thanked 1,525 Times in 1,126 Posts	...an overdrive "shifts" (pardon the pun) the engine RPM's at highway speeds down into the 'slower' 1000-2000 RPM range where the engines' SFC is "least" for "power" produced, ie: the "best" fuel-economy area of the engine operation.