When I'm asked ,what do you get to the gallon, I really don't know, maybe 25 miles. Only once have I ever tried to calculate this, prior to a long journey I filled my tank to the brim (say 43 litres) and clocked the mileage, then before the return journey filled up again say 54 litres, .
Am I right that by deviding the mileage, say 285 miles by litres used,54 gives me miles per litre then convert to mpg?
It's just that my fuel guage seemed to be lying to me cos there was no way I could get 54 litres in when compared to the reading prior to the journey.
Have you ever suspected the validity of the measure you are getting at the pump cos this makes me wonder