Well I picked up my truck wednesday after work. I filled it up about a block away from the dealer. (they only put 1/2 tank in the truck for me. ) I put 125 miles on it that night. Well i finaly had the fill it up today, not really but i was going by a station and i noticed it was about . 05 cheaper then the one by my house so i stopped. it had 300+ miles and i put about 25 gallons in. I did the calc, it came out to 12. 5 MPG. the over head read 12. 8. I 'm very happy for the first tank. I was driving the truck pretty hard sometime showing it off to friends. this tank full i'm going to keep it at 65mph and try not to floor it at all the stop lights to see how good it can get. :--)