Quote:
Originally Posted by 777funk
So will lower RPM's equate to less fuel consumed?
I'd assume to maintain a given speed there's a balance of torque/RPMs. Lower the RPM's; raise the torque required by the engine. This seems to me that it's still require a similar amount of fuel since even though the engine is turning slower it's still feeding itself enough fuel to keep the higher torque.
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With a diesel, fuel economy always benefits from lower engine speeds. The fuel consumed to do the work remains relatively constant and the fuel required to overcome engine friction is reduced.
There are exceptions if you push this philosophy too far, but, with regard to larger tires, they
always provide better overall fuel economy in an automotive diesel.