fustbucket611, welcome to our website and forum. A litle more information would make this question much easier; such as how long and heavy is the coach? Where do you live? Are you going to be pulling a toad? THe reason I ask is that the engine and transmission may not be what you want, the engine is under powered and the transmission will effect your fuel milage.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7