thanks for the help. I have the engine size, type and tank size set. I tried setting it to 10 gallons at the fill up and it read like 130% full and the mileage shown was single digit. when i only shown it filled to 100% full (at 5 or 6 gallons) the mpg was higher but still very low for my car. but i will continue to use it with what you have told me.
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