I suppose the most accurate way would be to first ensure your tank is bone-dry...that is no puddles of gas remains in the tank or any in the lines up to the injectors....then measure a single gallon of gas....not by the pump calculation but by what ever way gallons are accurately measured....pour that gallon of gas in and see how far you can go until it stops.
Because that is not very practical I just fill the tank till it clicks off.
I personally don't mind if it varies slightly.
This is the way MPG's have been calculated since the gravity gas pumps dissappeared.
(I guess that's what they were called)
Efficient drivers do it better.
1003 miles a tank personal record. 74MPG calculated. HCH1 CVT
|