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I know my tank size (19 gal), but I have the gas gauge (lower right) and then I have range readouts. The range will will change based on the MPGe. When road tripping, I know I will get well over 400 miles on a 3/4 of a tank of gas. I have driven 440 miles, mostly all highways, and at a 1/4 tank left, it has told me I…