I own a 2003 F-250 xlt, 4x4, V8, 3.73 limited, extended cab with 8ft bed, 39 gallon tank. I don't have many miles on it, but my gas consumption has varied. The first few tanks gave me an average of 10.4 mpg. This was all around town, no quick accelerations, driving very cautiously. I recently took a longer highway trip, no real load, and my gas mileage improved dramatically. Driving mostly flat areas(very few hills) my gas mileage on one tank was 17.6 mpg. When I got into more hilly areas my gas mileage on the next tank was 14.5mpg, but I did add two additional adult passengers on that leg of the trip so my weight increased along with their luggage, but still wasn't anything major. The almost exact same figures were experienced on the return trip.
I didn't calculate my overall average from the combined highway and local trips yet, but was really surprised by the 17.6 mpg figure considering I was travelling really fast. I wish I got that mpg all the time.
I don't know how much the different blends of gasoline affect my mpg or what the prevailing winds did to help/hurt my gas mileage, but I am sure all of that factors in somewhere.
I am pretty sure that over the life of the truck and considering I use it almost exclusively around town I am going to be looking at 10-11 mpg, but I hope not!
Last edited by dballs; 05-04-2004 at 10:32 AM.