I have a quesiton regarding the gas capacity of a 1995 Mustang as compared to what the fuel guage reads. I recently filled up my tank, and it got 13.9 gallons in. WHen I pulled in my gas guage was right on empty (The needle was completely covering the red line) on level ground, however 13.9 gallons is a full 2 gallons short of the 15.9 gallon capacity. Is there that much left in the tank? Thats 40 extra miles!