Class C MPG

There is only one way to accurately compute your mileage. The tank has to filled to precisely the same level EVERY time. Different pumps will kick off at varying levels which insures you will get bogus mpg compuations.

The only way to even come close to the same fill level is to top it up until you can see the fuel in the fill tube, which by the way is prohibited on every pump: "Do not top off". If you do manage to get it exactly full, every time, over the course of a dozen or so tanks then and only then will your mpg computations have any validity/accuracy.

The typical rv'er gets the tank really, really full, drives several hundred miles and then fuels until the pump shuts off(any number of gallons short of his last fill). Now he does the math of miles divided by gallons and smiles proudly over his obvious driving skills that have netted him "X" mpg. Next he rushes to the internet to share his good fortune and obvious driving prowess.

We have all done it(yep, me too), perhaps inadvertently but the number is still bogus. I'll say it again... if you want honest numbers go back and reread paragraphs one and two above.

As always... Opinions and YMMV
:B

10.5-11 with 24' Chevy 6.0 pulling a 3000# trailer. That's without a head wind and I drive right around 58mph.

Well Matthewc45, I believe that the secret is only driving downhill. Get to the bottom, and sell the darn thing... lol

We have a 2004 26q fleetwood jamboree with the v-10 and just return from our longest trip of 1800 miles, with towing a 2012 Toyota Camry. I kept my speed under 65 and drove without the cruise in the hills. The total trip I average 7.9 mpg. I filled up every 360 miles with 45-46 gals each time. I also ran the a/c on the motor and no gen. I would love to know how some people with larger class c or getting 10 mpg.

We have a 29ft b+, by Monaco , gets 12.6 not towing, and a solid 10 towing. Nice unit, drives like a dream. Finaly got 20k on the clock.now it's all happy-camping

A word of caution about the fuel savings described with the Sprinter diesel - you'll spend what you save in fuel on repairs, assuming you can even get a competent diesel shop to work on them. Regarding other bloated claims on fuel mileage, as some have stated previously, base your projections on the lower numbers. I anticipated 14-15 MPG when I purchased my 2008 Outlook 31C on a Chevy chassis based upon these forums. Have never come close to those numbers, best I have achieved was 8.5 MPG. Length of motorhome (i.e. weight), cab over configuration (aerodynamic or a brick), speed driven are all variables to MPG.

1. ~8 MPG

2. You should check out the search function here. It's quite splendiferous! ;) (Hint: This topic may have come up before. Maybe.)

My $13K 1995 Fleetwood Tioga Montara 23 ft (Ford E-350 with monster 460 big block) driving 55 and 45 on the mountain passes: about 10 mpg

I recently installed a K&N air filter and that seems to have taken it from 8 to 10 mpg.

Fourwheeler.com "Project MPG" series in 1999 has various options for getting more mileage out of a 460 engine... with payback calculations.

My friend's $90K '11 Navion 24 ft with a MB Sprinter turbo diesel: about 14 mpg. Fun to drive up mountain passes, not fun to purchase ;)

midnightsadie wrote:
if you want MPG get a sprinter with a mercede benz diesel

Except that in most cases that's false economy. You get better mileage, but actually spend more money not less.

The cost of the buying the Diesel engine exceeds the savings from the improved mileage in most cases.

My 25 ft actual with Chevy 8.1 , I get a low of 9 but a consistent 9.5 to 10.
If someone is getting less than than they should look at their driving habits. Getting more 11 requires a Diesel engine.