It’s one of the most common questions F-150 owners ask before buying a bed cover: will it actually save fuel, or is that just marketing? The short answer is yes, but the amount depends on the cover style and how you drive.

The Aerodynamics Behind It

An open truck bed creates turbulent air that increases drag, especially at highway speeds. A tonneau cover smooths airflow over the bed, reducing that drag. The effect is most noticeable above 50 mph, where aerodynamic drag becomes the dominant force working against fuel economy.

Typical Fuel Economy Gains

Most owners and independent testing report fuel economy improvements in the range of 1-2 mpg on highway trips, with smaller or negligible gains in city driving where aerodynamics matter less. Low-profile hard covers and retractable covers tend to produce slightly better results than roll-up covers, since they sit flatter against the bed rails.

Factors That Affect the Results

• Driving speed — gains shrink significantly below 45 mph
• Cover profile — lower, flatter covers outperform bulkier designs
• Tailgate position — some gains depend on keeping the tailgate up
• Vehicle load — a heavily loaded truck sees less relative benefit

Is Fuel Savings a Good Reason to Buy One?

Fuel savings alone rarely justify the cost of a tonneau cover on their own — the payback period is long for most drivers. But paired with the security and weather protection benefits, it’s a reasonable bonus rather than the primary selling point. For help weighing cost against features, see our Tonneau Cover Price Guide.

Related Reading

• 2021-2026 F-150 Tonneau Covers: Complete Buying Guide
• Retractable vs. Folding Tonneau Covers: Which Fits Your F-150?
• Tonneau Cover Price Guide: What Should You Actually Pay?

Note: Fuel economy figures cited are general industry observations and can vary by driving conditions, vehicle configuration, and cover type. Individual results will vary.