Accurate fuel fill without topping off?

[YarisOwnersDad]

Steve:

The error in fuel mileage calculation due to the degree to which the tank is filled should be minimal over several tanks of gas. The error should cancel itself out over several tanks.

I have read the same thing that you have about how over-filling can be harmful to the fuel evap system, so I stopped doing that. When the pump kicks off the first time, I remove the nozzle.

Tom

[sbergman27]

Originally Posted by YarisOwnersDad

Steve:

The error in fuel mileage calculation due to the degree to which the tank is filled should be minimal over several tanks of gas.

True enough. I do like to have accurate readings over the course of a tankful because I can more easily correlate conditions with mpg. But as I gain more trust in my Scangauge II, that may become less of an issue.

But it is nice to have that extra gallon of fuel, and the extra range it represents.

-Steve