10 Proven Tips to Save Fuel on Your Next RV Road Trip

Fuel is the single biggest variable cost of RV travel. A Class A motorhome getting 6-10 MPG on a cross-country trip can easily burn through $2,000+ in diesel or gas. Here are ten strategies that experienced RVers use to cut fuel costs significantly.

1. Slow Down

This is the single most effective fuel-saving strategy. Every 5 MPH over 55 MPH costs you roughly 7% in fuel efficiency for a large RV. Driving 60 instead of 70 on a 2,000-mile trip in a Class A could save you $200-300 in fuel. Plus, you'll arrive less fatigued and safer.

2. Check Tire Pressure Every Morning

Underinflated tires dramatically increase rolling resistance and fuel consumption. Check pressures when tires are cold (before driving) and inflate to the manufacturer's recommendation for your loaded weight. A good TPMS (Tire Pressure Monitoring System) pays for itself in fuel savings and safety.

3. Plan Routes to Avoid Mountains When Possible

Climbing grades destroys fuel economy. If you have the flexibility, choose flatter routes even if they're slightly longer. Use RVmapper to compare routes and estimated fuel costs. Interstate 10 across the southern US is generally flatter than I-40 through New Mexico and Arizona.

4. Fuel Up at the Right Places

Use apps like GasBuddy to find the cheapest fuel along your route. Truck stops (Pilot, Flying J, Love's) often have competitive prices and are designed for large vehicles. Avoid gas stations right off the interstate exit — drive a mile into town for better prices. Many fuel discount programs (Good Sam, Pilot Flying J Rewards) save 3-10 cents per gallon.

5. Reduce Wind Resistance

Store everything inside rather than on roof racks. Close all windows and vents while driving. If you're towing, make sure your towed vehicle is as close to the RV as safely possible. Some RVers report 5-8% improvement just from removing a roof-mounted satellite dish.

6. Maintain Your Engine

Clean air filters, fresh oil, and properly tuned engines run more efficiently. A clogged air filter alone can reduce fuel economy by 10%. Change your fuel filter on schedule — a restricted fuel filter makes the engine work harder.

7. Lighten Your Load

Every 100 extra pounds reduces fuel economy by about 1-2%. Drain your fresh water tank if you'll have hookups at your destination. Don't carry a full propane tank if you won't need it. Leave the heavy books at home and use a Kindle.

8. Use Cruise Control on Flat Roads

Cruise control maintains a steady speed and avoids the fuel waste of constant speed adjustments. However, turn it off in hilly terrain — cruise control will downshift aggressively to maintain speed on hills, burning more fuel than gentle speed variation.

9. Drive During Off-Peak Hours

Less traffic means less stop-and-go driving. Early morning departures (6-7 AM) typically mean lighter traffic, cooler temperatures (better engine efficiency), and you arrive at your campground with the whole afternoon ahead of you.

10. Consider Your Driving Days

Sometimes the most fuel-efficient strategy is driving fewer, longer days rather than many short hops. Each startup wastes fuel as the engine warms up, and highway cruising is more efficient than city driving to and from campgrounds. Plan 250-350 mile driving days and spend more time at each stop.

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