MPG on a 2000 Monaco Diplomat 315hp (ballpark)

With our 400 ISL and 41' we get anywhere from 7½ to 9, depending on many factors, with speed being the main killer. I try and stay around 60± MPH and on most roads I can expect 8-8½. The 315 ISC will get about the same or a little better mileage.

10 at 45 mph, 8-9 at 55, and 7 at 65 in the East. Take 0.5 off in the western mountains.

I forgot to mention its a 38 footer.

Haha, heck that's better than my old 1978 class C with the 400 4 brl carb.

Ivylog wrote:
10 at 45 mph, 8-9 at 55, and 7 at 65 in the East. Take 0.5 off in the western mountains.

X2

Actual experience will depend on how you drive, the kind of roads you are on, and the weight of your coach. But, 8 to 10 is a reasonable estimate as mentioned above.

I think you will do a bit better with your older Diplomat that the 42' Dynasty...thinking closer to 8.5 at 65 in the West.

I agree it could be a little better, but for a new member I'd rather have them happy with the mileage if they buy it and a lot depends on how you drive it and how much brake you use.

motorhomes get about 50 cents to the mile. Gas or diesel it matters not. $2 a gallon or four, still fifty cents a mile...

JimM68 wrote:
motorhomes get about 50 cents to the mile. Gas or diesel it matters not. $2 a gallon or four, still fifty cents a mile...

:h

8 mpg, approximately $4.00/gal. $.50 per mile. Just got back from a 1850 mile trip spent $875. 50 cents is a good number (as a quick gauge), I'm not sure if the rest of the logic works