[double_j]

Originally Posted by Apple Corps

Have had it happen many times. Have you ever seen the sign on the tank to NOT TOP OFF?

http://clark.com/cars/why-you-should...your-gas-tank/

In this case it's not a top-off. The pump actually stops before the gauge reads as full. OP isn't trying to squeeze a few extra gallons into the tank, OP is just trying to fill the tank all the way.