Troubleshooting Miles Per Gallon on 2015 Ford F-350 Dually 6.7 Diesel

Question:

with just over 100k miles all highway miles at 65-70 mph we use it to pull a 3 horse goose neck trailer usually with 2 horses in it at a time each weigh about 950 lbs when it was new we were getting about 15 miles a gallon now its down to 10.5 can you help?

asked by: Steve

Expert Reply:

For your 2015 Ford F-350 dually 6.7L Diesel, if you have been doing the general maintenance, It is probably time for a transmission fluid and filter change.

After that, I recommend the Edge Diesel Evolution CS2 Performance Tuner - Color Screen # EP85300 or the Edge EvoHT2 Hand-Held Performance Tuner - Ford # EP16040 to help you get your factory settings back or increase them for your driving functions.

There are other things like a transmission cooler that will also help. I recommend the Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets - Class IV - Efficient # D13504 to help your transmission function at a greater capacity.

expert reply by: Jason S