[Vanner]

All excellent points, Who, and I may be underestimating hills here. I think everyone agrees, if you're hauling around bags of sand go ahead and don't. Both weight and drag are wonderful things to eliminate, but because drag accounts for so much more of the engine load, reductions there surely offer more bang for your buck in a strictly highway/interstate application.

I'm new on this site, but I've seen civics and metros here with conversions I've never even dreamed of. If those cars warrant that kind of work, imagine what that % reduction in drag would do for an RV! If NovaEona is entertaining those ideas, as I am, I would not expect weight to be the limiting factor.

None of this matters if you can reduce speed, that's the best tip of all, especially for an RV.