Aerodynamic Tips to Reduce RV Fuel Costs

Meta Description: Practical adjustments to your RV setup that cut wind drag and cut fuel bills. Aerodynamic Tips to Reduce RV Fuel Costs.

RVs are essentially rolling bricks. Their large, flat fronts and boxy shapes create significant aerodynamic drag. At highway speeds, aerodynamic resistance becomes the primary factor in fuel consumption, often exceeding the impact of weight.

1. Roof Management

Rooftop accessories significantly increase drag. Keep your roof as clean as possible. While you can't remove A/C units or vents, be mindful of where you place solar panels and avoid storing bulky items on top of your rig.

2. Dealing with Side Winds

Awnings and slide-out toppers, especially if they catch the wind, can add to your aerodynamic profile. Ensure they are tightly secured. In strong crosswinds, slowing down is the best aerodynamic strategy.

3. The "Tailgate" Debate

If you're towing a fifth wheel with a truck, a popular myth is that lowering the tailgate improves mileage. Studies have shown this can actually increase drag by disrupting the air bubble in the truck bed. Keep the tailgate up or use a tonneau cover.

4. Underbelly Drag

The underside of your RV catches a lot of air. While you can't easily change this, ensuring that underbelly panels are secure and not dangling can prevent unnecessary turbulence and drag.

5. Window Etiquette at High Speeds

Opening windows at highway speeds destroys your aerodynamics by turning your RV into a parachute. If it's hot, using the A/C at high speeds is actually more fuel-efficient than driving with the windows wide open.

6. Using Wind Deflectors

If you tow a large travel trailer or fifth wheel, consider adding a wind deflector to your tow vehicle. These help push the air up and over the trailer, reducing the blunt force impact on the front cap.