even if you drive it til it rusn out of fuel might stil have fuel in tank if you was only able to add 15 then most likey it wasnt emplty but was real close to it just so you know its not good to run a car on low fuel lower you go more trash is in tank more chances of sucking it up messing up your fuel system more chances of tank forming water by sweating just asking for problems running on low tank but dont have a reserve you just didnt run out is all and you never want to run out you have to walk
