Older MH mpg with diesel

billy1davis wrote:
We are considering a purchase of a 15 to 20 year old MH.
I am wondering what the MPG would be. Probably a 30 to 36 foot with or without slides. Driving around 60 mph and just two of us and pulling small lite truck

If you really think that MPG will be much of a factor for operating costs, don't be figuring on more than 6 - 8 mpg, over a period of years for all terrain.
Also, don't forget the genset, which will burn between 1/2 - 1 gallon per hours, when running.
Actually, you'll already be pretty much eliminating the biggest cost of ownership and cost per mile, for much better than average DPM (depreciation per mile).
For whatever reason, this is one of the least things discussed, with very little posting and threads of such, while MPG is one of the most popular.
Well that and Wally World for overnight stays, which by the way, is the best way to save on fuel, hands down. As in Boon-docking specifically and for wherever and whenever you can do so, if so inclined.

My neighbor has a 20 year-old diesel like you describe. He claims to get 10 MPG no matter how he drives it.

MPG should not even be a consideration. What difference will it make if you get 7 MPG or 10 MPG? Find and buy the RV that you love and that meets your needs. Over the course of 10,000 miles per year, that 3 MPG is less than $1500 and should not be a factor you use to determine if you have found the right coach.

My 1999 36' Foretravel with Cummins M11 will get anywhere from 7 to over 10 mpg depending on terrain, winds, and whether I'm towing or not. My speed is typically 62.

My Cat C7 (350 HP) gets a pretty consistent 8 mpg. I usually drive the speed limit +/- 5 MPH towing a Honda Accord.

Lou
05 Travel Supreme
38' with 4 slides

Last Christmas I checked mine on 1400 mile trip towing a trailer weighing 5000lbs and got 9.2 mpg for the whole trip. 60 65 mph 8.3 Cummins

If you are concerned with range on a tank of fuel, fine. If you are concerned about cost, RVing may not be for you.

My 2005 Expedition CAT C7. It gets around 7-8. 62-63.

MPG is one of the last things to worry about.

Mine is over 20 years old 36 foot single slide with a small Detroit diesel we get 9.5-10 mpg
we pull a 4door wrangler and travel at 60-62