Any easy way to detect the engine's "null point" when driving?
One instrument I wish I could find is one that would tell me when the engine hits the "null point", the point where it switches over from propelling the car to engine braking the car. Right now I have to memorize or keep a chart of the fuel consumption when reving the engine to various rpms when unloaded and either pop the clutch and freewheel or go to "N" whenever my fuel consumption drops below that point while driving.
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