16 MPG combined. The 2018 Lexus GX 460 isn’t winning any fuel economy awards. This is a body-on-frame SUV with a naturally aspirated V8, a full-time four-wheel-drive system, and a curb weight over 5,000 pounds. It’s built for durability and capability, and efficiency is pretty much last on the list. This vehicle is designed for a specific buyer: those who want ruggedness and reliability over saving money at the pump, and who care more about long-term dependability off the beaten path than image and status. They buy this specific SUV for its old-school charm in an increasingly crossover-centric world.

City and highway performance

The GX 460 gets 15 MPG in city driving and 18 MPG on the highway. These numbers show the GX’s disadvantage in stop-and-go traffic where its weight and large engine work hard to get it moving. On the open road, the highway figure is slightly better but still reflects the aerodynamic limitations of its boxy shape and tall ride height. The six-speed automatic transmission is proven and smooth but less efficient than the eight, nine, or ten-speed units in newer SUVs.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Lexus GX 460 at $3,600. This is based on driving 15,000 miles per year with fuel prices at the national average for regular unleaded gasoline. Your actual fuel costs may change based on your driving, location, and fuel prices. However, the $3,600 reminds buyers of the costs of owning this type of vehicle. It’s a significant expense, especially compared to more fuel-efficient SUVs and crossovers.

Real-world expectations

The EPA estimates provide a baseline, but real-world fuel economy can change. Many GX 460 owners report achieving numbers close to the EPA estimates in mixed driving. People who frequently tow, drive in mountains, or spend most of their time in heavy urban traffic will likely see lower numbers. On the other hand, those consistently driving long distances on the highway may see the higher end of the EPA range. Aggressive driving will hurt fuel economy in this vehicle, while smoother acceleration will help mileage.

How it compares

The Lexus GX 460’s fuel economy is poor compared to its competitors. The Acura MDX, a popular three-row crossover, gets 22 MPG combined with its V6 engine and front-wheel-drive (SH-AWD variants are slightly less efficient). The Land Rover Discovery, another off-road SUV, manages around 19 MPG combined with its supercharged V6. The Jeep Grand Cherokee, in its base V6 trim, also gets better numbers than the GX. GX buyers aren’t usually comparing these vehicles. They want something only the GX and maybe a Toyota 4Runner can provide. For a look all all Lexus fuel economy data across the range, there are options with vastly better numbers. If you’re curious about the trends for this model, check the GX MPG across all years.

Tips to maximize efficiency

The GX 460 consumes a lot of fuel, so to maximize efficiency, make a conscious effort. Avoid aggressive acceleration and heavy braking because these habits significantly reduce fuel economy. Gentle and consistent throttle inputs will make a difference over the course of a tank.

Regular maintenance is also important. Make sure that your tires are properly inflated and that your engine is tuned to the manufacturer’s specifications. A well-maintained engine operates more efficiently and consumes less fuel.

Minimize idling time, especially when the engine is cold. Idling wastes fuel and can damage the engine. If you anticipate being stopped for more than a minute or two, consider turning off the engine.

Consider your driving routes. Avoid congested areas and routes with frequent stop-and-go traffic when possible. Highway driving gives the best fuel economy for the GX 460, so plan trips accordingly.

Be mindful of extra weight. Remove any unnecessary cargo because added weight directly impacts fuel consumption. The less your GX weighs, the less fuel it will need to get moving.