MPG for class B models

At 21,000 miles on the odometer, I'm getting 15 MPG (Chevy, gas engine). This is with frequent A/C on often hilly terrain. I expect the fuel economy to improve even further and hope to get 16+ eventually. I rarely drive over 60 MPH.

The original owner put 6,600 miles on it and was towing. The readout was 13.5 MPG when I bought it.

We get 19/20 MPG (diesel) but we drive 58/60 MPH. Our driving so far has been mostly on fairly flat roads. I am sure once we hit the mountains, that will drop. With our last B, a 1999 American Cruiser on a Dodge 3500 Chassis, no duals, 360 gas engine, we averaged 14/15 MPG driving 60 MPH on reasonably flat roads.

2006 Pleasure-way Plateau TS, 2500 Sprinter.

23.3 with full propane, diesel, and fresh water tanks.

21.5 with the above plus furnishings, bedding, clothing, pots, utensils, dishware, non-perishables, books, tools, hoses, other assorted junk. Oh, and an, until recently, a leaden foot.

I've never kept careful records, but my estimates over the past 6 years come in around 13 mpg in my 2007 PW Ford (gas) V8. I drive with a lead foot--75 mph is great. :D

2010 Winnebago ERA (2008 Sprinter 2500 Chassis)
Purchased new in October 2010 - 32,605.9 miles average fuel mpg is 19.56
Presently for 2013 we are getting 20.06 MPG
We've charted every drop of fuel since October 2010.
Our best fuel milage as 23.17 in May 2013
Our worst rule milage was 17.10 in April 2011

I am averaging 22.5 in my 06/07 Freighliner Airstream

Davydd explained it well.

Our Leisure brochure (and the guy we bought from) reported the mpg as 22 for our 2500 Sprinter van, but I was skeptical. We've kept records at each fill-up. In 26,000 miles and almost three years since we bought the van (used, not new), our average diesel mpg has been a little better than 23.

(Our best so far was 25+ last winter on flat stretches of highway, minimal stops and starts, at conservative speeds using cruise control.)

A new Sprinter van would be different. Some changes were made to 2nd generation Sprinters in the US market starting in 2007 and resulted in a reduction in mpg. Some Sprinter converters' RVs now are the 3500 weight class and have dual rear wheels.

Of course, diesel costs more than gas these days in the US.

UPDATE: Getting 25.8 on our current trip based on first three fill ups. Really surprised because the first few days were in the Great Smokey Mtn NP area, lots of climbing.

My 1997 Dodge with 5.2 ltr. Gets an average of 16 but I have a low poptop from Sportsmobile. Look at my profile for pic.

You guys are downsizing, so the only option you'll probably be comfortable with is a Sprinter class B. That's us.
I've been keeping good records on our new one with a phone app, and the results so far have been: 5411 miles, average mpg = 17.15, best has been 20.45, worst 14.85.
This is driving in Iowa, Kansas, Missouri, Oklahoma, Texas, Louisiana and the Arkansas mountains. Always right at or just below the speed limit, (68 on Interstates)

Sprinters are known for their mileage to go up after 10k+ miles. We're not there yet. Hope this helps

There has been lots of Class B MPG discussions in this forum. It depends on what kind of B you want as they vary in fuels (diesel/gas) and mpg. Regardless they are all considerably better than any C. They probably range from a low of 13 mpg to 18 mpg with gas engines in overall average from what I've read in this forum.

For diesel my 2011 Sprinter Great West Van Legend has an overall diesel consumption after 50,000 miles of 18.6 mpg average. Highest I recorded on a fill was 20.4. My former 2005 Sprinter Pleasure-way Plateau had a 22.5 mpg average over 61,000 miles. The highest was about 25. You can achieve those highs mentioned driving on flat roads at 55 mph with no head winds.