I installed my TITAN tank about a week ago and am curious how many miles can i expect to go before a fillup. I am not sure if my fuel tank gauge was working for a couple of days bcus it seemed to have been stuck but it now is working. I am currently at 545 miles and still have one mark above half a tank full. I realize this is a bigger tank and am not sure if I am at the correct miles for the gauge. How far have you guys gone on a full tank running empty (no hauling), just driving back and forth to work. It was about a week b4 the fuel gauge moved off of 3/4 full mark.