When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Rather than speculate about diesel gas mileage, I can give you mine. I recently towed my 32' 5th wheel (8000 lbs) 200 miles with my 2015 F350 with a 6.7L diesel that has 3.55 gears and single rear wheels. This vehicle is stock and doesn't have any deletes, programs, or mods. I normally get around 13mpg in town, 17 on the highway unloaded. When pulling the 5th wheel, I got around 9mpgs. This was on mostly flat land with a few small hills. Now it was my first time pulling a trailer in a long time and I did stick my toe in a few times to feel the power, but this was the average over 200 miles. Here's a picture of my rig and the camper.
I'm with everyone else, no tuner will give you any towing mpgs. I had a 5star on my last 6.2, I got no mpg gain during any driving situation. Gears are reported to do as much as 10% during towing situations which is no where near 2-3 mpgs. It would be nice to know what gears are in your truck and the tires/size you are running.
I can generally report the same. Just got home from a Florida vacation. 1200 miles each way. Towing a 7x18 enclosed trailer with 4 motorcycles worth 2800 pounds. Plus luggage, tools, etc.
5 Star with 87 Daily/Tow going down. Used 87 economy on the way home. Tow/haul button engaged all the way. MPG was 8 - 8.5 average each way according to the truck's computer. The 5 Star is money I will not spend on the next truck.
2016 Super Crew with 6.2 and 3.73.
We just traded our 6.2 for a 6.7, both F350 CC 8ft bed. 6.2 averaged 13.5 all around driving and 5mpg pulling our 39ft Montana fifth wheel. So far our PSD is averaging 16.2 all around and we'll see on the towing end this weekend. My second biggest complaint with the 6.2 lack of power on incline. More often than not on a minor hill shifted to 3rd to maintain 65 mpg. We have 2 years on the ford warranty than bye bye dpf/cat
I think those comparison are pretty consistent with gasser versus diesel. I have the two trucks in my signature and did a comparison towing exactly the same fiver with exactly the same tow equipment in each one, one run after the other. My 02 is a dually so that changes things a bit, but the most significant factor was the downshift to 3rd with my 6.2 on the grades.
If you know Interstate 81 between Abingdon, VA. and Bristol, TN. on the steeper sections there (and they are not very steep), I was in 3rd with a 9,500 pound fiver on the back with the 6.2. The 02 just chugged along. I like both trucks, but they are truly very different animals. I am sure with the newer diesels the difference in even more pronounced. I get 8.5 towing with the 6.2 and 10.5-11.0 with the 7.3.
We just traded our 6.2 for a 6.7, both F350 CC 8ft bed. 6.2 averaged 13.5 all around driving and 5mpg pulling our 39ft Montana fifth wheel. So far our PSD is averaging 16.2 all around and we'll see on the towing end this weekend. My second biggest complaint with the 6.2 lack of power on incline. More often than not on a minor hill shifted to 3rd to maintain 65 mpg. We have 2 years on the ford warranty than bye bye dpf/cat
That's awesome gas mileage pulling that size of 5th wheel. I guess you've had some experience moderating your driving to get it up that high.
The downshifting and acceleration capability is the only differences I noticed with the diesel compared to my dad's gasser (3.5L ecoboost). The gas mileage was similar 8mpg (G; 4500lb bumper pull) vs 9mpg (D; 8000lb fiver). When you push the gas on the diesel it just goes where the gasser has to work at it. I thought it was pretty neat that the diesel rarely downshifted going up minor hills... just raw power.
I'm still looking for that sweet spot towing speed most of my travels are on I 70 where we always have a 20 to 30 mile an hour southwest side wind. The new PSD will tow at any speed you set it at. Set the cruise at 70 with the trailer and we were getting 7.6 by the time we got to Colorado same speed it was up to 8.8 and that's all going uphill. Then on return trip was running 14 coming out of the mountains once we hit the flatlands with a 25 mile an hour headwind back down to 7.8 just didn't seem to make much difference between 60 and 72 on my mpg but slow down to 55 it was every bit of 10+ . So that's one reason I'm reading this thread. Truck is a 17 with 3.55 trailer is a very tall Montana roughly 14,500 pounds. The truck running solo down the highway at 73 is in the 16s. I have yet to have a friendly wind, I'm always fighting it . I was really surprised the truck did so much better in the mountains then just flat towing with a wind.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
