I am wondering if anybody else gets only 8-10 miles to the gallon when towing. I just bought the truck and the water pump went out luckily it was the indirect injection model so it only cost $150 instead of $550. Then I had to replace the front brakes because it was pulling to the left. It still pulls to the left, I think it still has a bad caliper. Also I get lousy gas mileage I think I only get 8-10 when towing about 3500 pounds, so I put it in the shop at Ford. They said the injection pump wasn't putting out enough pressure so they replaced it at a cost of $1100. They said it would definitely help the gas mileage, it didn't.
The ford dealer said they couldn't find a single thing wrong with the truck, guess its supposed to get 8-10 miles to the gallon.
Traditionally, these trucks give 8 - 10 mpg, no matter what. I have a manual transmission in mine, so I get better mileage - 10 to 13+.
This past month I pulled the Boy Scout Troop trailer, a 6 x 10 Wells Cargo, from N. Wisconsin to N.E. Illinois and got almost 12 mpg @ 70 mph. One reason for the "good" mileage was the fuel I used was not "reformulated". While the brand of gasoline does not make a difference, the area of the country does. On the trip up to N. Wisconsin, I did not tow the trailer and got almost 11 mpg, using "reformulated" gasoline from the Chicago Metro area.
I have a 1994 F-350 7.5/460 "dually", and it is probably the best running vehicle I have owned. With a load, (a 13 foot 1968 cab-over camper, towing a 22' 1978 day cruiser "barge"), I averaged 9.1 mpg. In town I get an average of 8.6 mpg. This is with a Hyper-tech module, Stainless Gibson exhaust, K&N air intake, and driving "grandpa" style. So, I would say that no, the mileage isn't good, but it kind of makes up for it with it's working abilities. Overall it's a pretty good truck. And considering my old F150 got 10 mpg city with an in-line 300ci 6 cylinder, I can live with it.
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