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[Chance]

Originally Posted by JamieGeek

...cut....

Currently I'm getting about 8.5 mpg on our Axis regardless of how I drive and if I'm towing a car or not...just the nature of the beast.

That's a major drawback compared to Class Bs, even the gasoline-powered Class Bs.

Owners of Winnebago Travato report up to 17 MPG on gasoline when driving conservatively, which is essentially double what you are getting. Obviously your Axis is a lot bigger, but it's not twice as heavy or twice as large in cross section to wind drag. And the V10 engine, while large and powerful, isn't twice as large or powerful. Something seems less than optimum.

I see no reason why these Axis or Vegas shouldn't be getting between 10 and 12 MPG on the highway when driven conservatively (assuming no generator use). The only explanations that make sense is that their Cd is very high, or else the total gearing isn't high enough for such a small and light RV (the more probable reason in my opinion).