Gas mileage, environmentally friendly remodel

I,d say no, your mpg might increase but not enough you,d see it, a truck chassis was built to work not get good mpg, the chassis when built has no idea its gonna be a MH. best way to get mpg is keep it at 55mph. or get a mercedes benz diesel. thats what I did and ain,t never going back to 8mpg. we had a 24ft bornfree V10 8mpg on a good day. bought a 24ft leisure travel van freedom serenity II. I 5 MB diesel and get just over 20 mpg .