R Red Ryder Junior Member Apr 9, 2013 #2 It will show above full. But the best way is to start empty, add one gallon then set gauge on empty. So it doesn't matter what it shows on full, you'll know you have a gallon left when it shows empty. Time to filler up.
It will show above full. But the best way is to start empty, add one gallon then set gauge on empty. So it doesn't matter what it shows on full, you'll know you have a gallon left when it shows empty. Time to filler up.
