Inaccurate Gas Pump?

[Fat Charlie]

Don't forget to calculate the amount MMO you add as being gas... otherwise your tank is going to look even better!

[Chrysler kid]

I only fill at stations less than 5 years old, Texas soil expands and contracts and can damage the large I'm ground tanks. It's the main reason homes down here don't have basements and roads can only be paved with concrete.

it will be interesting to see if the premium fuel and mmo improved your effeciency. I can not comment on why the fuel additive helps on Hondas but just for kicks I added about an ounce to my lawn mower fuel. I could hear the idle change after the mower worked it's way though the feed line. Seemed to increase rpms without increasing or decreasing choke

[MPGomatic]

The numbers are in:

Overfilled tank produced 28.34 mpg (lowest tank ever), followed by 63.27 mpg (highest tank ever) back at the normal pump.

[roosterk0031]

When that happens to me, I move a gallon or 2 back to the other tank so I don't have a false best tank.

[AndrzejM]

I remember once when I was filling up my Polo that I saw almost 60 litres of petrol at the pump, I had fuel for at least 100km of driving and my Polo has 50 litres tank ;-)

That's the sad reality here in Poland sometimes...