Ford F350 7.3 DIESEL

New Comer

New Member
My husband asked me to see if I could find out any info on a Ford F350 XLT 1999 4X4.iT IS A 7.3 Diesel Auto.It's also a Dully,Long Box.He is a Dodge Mechanic and in his Third year Heavy Duty Mechanic,and was told that this engine would only get about 10 mile's to the gal.He was also told that another guy has one and he gets 26 miles to the Gal.Would anyone have any imput for us.Thank you for your time....

New Comer.

Tina Wyatt

Gary B

Senior Member
Ford F350 7.3 DIESEL

Hi Tina, welcome to the forum, all 3 mfg get about the same mileage in the real world. That engine will get about 17 to 18 mpg hiway driving, 13 to 15 city/stop & go driving and around 10 to 12 towing, the Chey & Dodge are very simular. I have gotten as high as 20 with mine, but only a couple of times. :) :laugh: :cool: :bleh: :approve: