Buying A Diesel Versus Gas Motorhome in Buying an RV Posted June 28, 2012 · Report reply I have to agree with the one fellow that said "Beware...don't take a test drive in a diesel if you're not prepared to buy one...!" I owned three different gassers before I bought my first diesel pusher. Two of my gassers even had the Banks PowerPacks installed on them. Once I got behind the wheel of a diesel and drove a few miles, I vowed I would never go back to gasoline. I am since on my third diesel coach. Yes, they cost more to maintain. But the ride, power, surge-braking and handling make it all worthwhile.