Forum Discussion

rbpru's avatar
rbpru
Explorer II
Jun 26, 2015

Hard numbers on MPG.

One of the show stoppers for the new RV owner is the fact that they get half the gas mileage when towing. In my case it drops from 19 mpg with no TT to 10 mpg when towing.:(

Our TV is typical; we have an F-150, 4x4 with E-Boost and averaged 10 mpg over 8,000 miles of towing last year. I suspect this is more towing mileage than most RV owners do in a year and less than a few others.

I read where some folk add modification to their TV to improve their mpg. So I decided to do the math to see what would happen if I got 12 mpg, a 20 % improvement.

Starting with $3.25 a gallon for gas seemed reasonable, so at 10 mpg it cost us 32.5 cent a mile to pull our TT. At 12 mpg it would cost only 27.1 cents per mile. This is a savings of 5.4 cents per mile. So, last year a 20 % improvement in mpg would have saved us $432.00.

The problems as I see it are,
1. 8,000 miles was for us an exceptional towing year for us.
2. I doubt that there is anything they can do to my F-150 to gain 20% on my mpg.
3. Cheaper gas would make the saving even less.
4. Even doubling the price of gas to $6.50/gal. :E or the towing miles to 16,000; there would still be less than $1000.00 worth of saving; not enough to justify a different TV or any extensive motor mods.

So for the DW and me 10 mpg it is. My TV and TT combination tows well, has good low end torque and a comfortable ride. Admittedly, If I was younger and in my gear head days or some other person who enjoys the challenge of improved mpg, the cost would be secondary. ;)

45 Replies

  • I know what you mean. My SUVs, both diesels, get 26-28 mpg on the highway unless I'm towing my TT, when they both get 14 mpg. And it is true, that for best economy, you want to spend as many nights camping and tow as few miles as possible. Wait, that sounds like a perfect week out in the woods, doesn't it?
  • We get 1 mpg better when towing downwind. Searching for wind for next week.
  • If you like the lifestyle better than moteling it, or go places where motels aren't, RVing is great. Based solely on economy, you have to spend a lot of nights, and the nights camped per mile driven ratio has to be pretty high, or you won't save anything by using an RV.
  • Sounds about right for a gasser, depending on the many variables involved we average 8-11mpg. Never give it much thought as it is all part of the costs to enjoy this lifestyle. Our 3/4 ton Chevy HD gasser is dedicated to towing our TT and just sits in the garage awaiting duty. Although there are other alternatives available that would indeed improve our overall mpg, their additional costs would never be realized in our situation.
  • Yup! My brother pulling a tiny Jayco ultralight with his economy gets worse mileage than I do pulling my 13K fiver. And empty I get nearly the same. Go figure?