"I think the mileage is computed from the injection volume, not the tank level."
And the injection volume is computed by the 'puter monitoring engine speed and the duty cycle of the injectors.
So the fuel actually used isn't really MEASURED.
The number the 'puter comes up with will only be perfectly correct if all the injectors are absolutely at exact flow "spec", and the gas temp/specific gravity is exactly what the system was calibrated at.
So, the mileage the 'puter shows you is actually an "educated guess".
A while back, some rumors were going around that certain aftermarket "chips" achieved better mileage on the "digital dash" by mucking with the software the 'puter uses to calculate MPG.
Whether true or not, I'm sure that would be possible.
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Today's Featured Article - Talk of the Town: Winterizin Engines - To Drain or Not to Drain? - by Staff. Another great discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "Winter is fast approaching..for a gas tractor should the gas tank be drained and run the engine til the carb is dry or do the gas stabilizer products I've heard of work? (tractor will not be used til spring) any other tips for winterizing?? "
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