How to compute mileage (mpg)?

You are just kidding this guy right?

mike hunt


Mark A wrote:
>
> Newbie" > wrote in message
> ...
> > It may seem like a superfluous question, but what is the best way of
> > calculating what mmg yuor vehicle is getting? I have my miles reading
> > of course, and I can record how much gas I put in, but there was some
> > gas already there in the tank, and how do I know what was traveled on
> > how much gas? If you have a good system, please share!
>
> You have to do it over a long period of time (many tank fulls) and then
> estimate the beginning fuel level the very first time. Any error in
> estimating the beginning fuel level the first time will be minimized when
> looking at 10 or more tanks of gas to calculate the mileage.