14 MPG combined is the reality for anyone considering a 2021 Toyota Tundra 4WD with the 5.7L V8. It’s a figure that won’t win any green car awards, but it’s also a number that’s largely irrelevant to the target demographic: buyers who prioritize capability, reliability, and the sheer presence of a full-size truck over saving a few dollars at the pump. These are the folks who need to tow a boat, haul equipment, or simply appreciate the Tundra’s ruggedness, reputation and resale value. Fuel efficiency is a secondary consideration, at best.

City and highway performance

The EPA estimates for the 2021 Tundra 4WD with the 5.7L V8 break down to 13 MPG in the city and 17 MPG on the highway. The city figure reflects the engine’s thirst during stop-and-go driving, where its considerable displacement and lack of fuel-saving technologies like cylinder deactivation are most apparent. Expect frequent trips to the gas station if your daily commute involves navigating congested urban environments.

On the open road, the 17 MPG highway rating is more achievable, but it still lags behind many competitors. This is primarily due to the Tundra’s older design and the inherently lower fuel efficiency of a large-displacement V8 engine paired with a relatively simple six-speed automatic transmission.

Annual fuel cost

The EPA estimates an annual fuel cost of $3,150 for the 2021 Toyota Tundra 4WD, 5.7L V8. This calculation is based on driving 15,000 miles per year and using national average fuel prices, which fluctuate considerably. Your personal fuel costs may be higher or lower depending on your driving habits, the types of roads you frequent, and the prevailing gas prices in your area. If you spend more time towing or driving in the city, expect to exceed that $3,150 figure significantly.

Real-world expectations

While the EPA numbers provide a baseline, your personal experience with the 2021 Tundra’s fuel economy will vary. Aggressive driving, heavy loads, and aftermarket modifications (like larger tires or lift kits) will all negatively impact fuel consumption. It’s far more likely that Tundra owners see an average in the low teens if they’re using the vehicle for its intended purpose.

If you’re hypermiling and sticking to a constant 55 mph on the highway, you might approach the EPA’s 17 MPG rating, but that’s hardly representative of typical Tundra usage. Consult online owner forums; you’ll see a range of reported MPGs, but the consensus lands squarely in the “low to mid teens” range.

How it compares

Compared to its competitors, the 2021 Toyota Tundra 4WD 5.7L V8 is undeniably behind the curve in fuel efficiency. For example, a 2021 Ford F-150 4×4 with the 2.7L EcoBoost V6 achieves around 20 MPG combined. Even the Ram 1500 4×4 with the 5.7L Hemi V8 and eTorque mild-hybrid system manages around 19 MPG combined. The Chevrolet Silverado 1500 4×4 with the 5.3L V8 can reach a combined 17 MPG.

These differences matter less to the dedicated Tundra buyer, who often prioritizes Toyota’s historically strong reliability and resale value over marginal fuel savings. If you’re cross-shopping based primarily on MPG, you’ll likely look at those other brands. However, consider viewing all Toyota fuel economy data to see how the Tundra compares to other models in the lineup. Before making your choice, browse TUNDRA MPG across all years to get a more detailed view of fuel consumption across the vehicle’s lifespan.

Tips to maximize efficiency

Optimize tire pressure. Ensure your tires are inflated to the recommended pressure listed on the driver’s side doorjamb. Underinflated tires increase rolling resistance, which directly impacts fuel economy. A few extra PSI can make a noticeable difference when you’re dealing with a heavy truck like the Tundra.

Drive smoothly and avoid aggressive acceleration. The Tundra’s V8 is responsive, but each stomp of the accelerator guzzles fuel. Anticipate traffic flow and maintain a steady speed whenever possible. Minimize hard braking as well.

Reduce unnecessary weight. The Tundra’s payload capacity is impressive, but carrying around unnecessary cargo in the bed adds weight and reduces fuel efficiency. Remove tools, equipment, or other items that aren’t needed for the current trip.

Consider a tonneau cover. While the aerodynamic benefits are debated, a tonneau cover can potentially improve fuel economy by reducing drag created by the open truck bed. It also keeps your cargo secure and out of the elements.

Minimize idling. Idling consumes fuel without covering any distance. If you’re stopped for more than a minute or two, turn off the engine. This is especially important in city driving, where idling can contribute significantly to fuel waste.