Most people buy an RV based on floorplan and price, but experienced RVers know the real decision factor should be how many miles you’ll drive annually. This number determines whether you should buy gas, diesel, or even consider a travel trailer setup. Get this wrong, and you’ll spend thousands more than necessary each year.
If you’re driving under 2,000 miles annually – mainly weekend trips and short vacations – a gas motorhome makes perfect financial sense. Yes, diesel gets better mileage (8-10 MPG vs 6-8 MPG), but diesel units cost $40,000-80,000 more upfront. At current fuel prices, you’d need to drive 6,000+ miles yearly for five years just to break even on fuel savings alone. Factor in higher diesel maintenance costs ($200 oil changes vs $75), and the math gets worse.
Here’s the real breakdown for different usage patterns:
- Under 2,000 miles/year: Gas Class A or C – lowest total cost of ownership
- 2,000-5,000 miles/year: Consider both, but lean gas unless you need serious towing power
- Over 5,000 miles/year: Diesel pays for itself through fuel savings and reliability
- Over 8,000 miles/year: Diesel is mandatory – gas engines aren’t built for constant highway use
I learned this the hard way. Bought a diesel pusher for weekend camping because I loved the smooth ride and quiet operation. Over three years, I drove 4,200 total miles and spent $6,800 more than I would have with a comparable gas unit. Now I tell everyone: be honest about your actual driving plans, not your aspirational ones.