Is there a way to look at fuel usage directly, some sort of gauge in the line perhaps? I've noticed that my car's DIC, my UG, and my OBDII/Torque app are all fairly inaccurate (usually in different directions), and the only really reliable measure of fuel usage is still the old hand calculated method... but that seems crazy when the car should "know" how much it's using, instead of calculating it based on other factors.
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