Thank you.
i realize that the light will come on when u got some left in the tank, my point was that i doubt it owuld do it with 5 gallons remaining.
what ill prolly do is get a gallon can and run until im completely out just to see exactly what im getting. at the moment im at about 280 miles on this tank and the light isnt on yet so i figure about 20-30 more. so call it about 300 miles to a tank which is pretty good apparently.i think ima get that complete gumout thing done this weekend too.