So my truck now has 15000 miles on it and I know the milage stinks to begin with but I have been reading posts for months now and most of you seem to at lest reach 14-16 at some point. I have never even come close to 12 and that is mixed travel with 50% towing small tool trailer. So my question is, is there something wrong or with my truck? if I bring it in to have it looked at what should I have them check? I don't know how much longer I can afford this. I am filling up 2 times a week at $165 a pop

HELP!!!