16 MPG combined. That’s the number that defines the 2019 Lexus GX 460. It’s a figure that might make some green-leaning buyers shudder, but it’s an acceptable compromise for the GX’s core demographic: buyers who prioritize strong off-road capability, bulletproof reliability, and old-school luxury over fuel efficiency. This isn’t a crossover pretending to be an SUV; it’s a body-on-frame bruiser built to handle serious terrain, and that comes at a cost.

City and highway performance

The EPA estimates the 2019 Lexus GX 460 at 15 MPG in the city and 18 MPG on the highway. These figures aren’t surprising given the GX’s naturally aspirated 4.6-liter V8 engine and its six-speed automatic transmission. Many modern SUVs use smaller, turbocharged engines and more gears to improve fuel economy, but the GX sticks to a simpler, more proven formula. The V8 provides a smooth and predictable power delivery, which is appreciated both on the trail and in everyday driving. The relatively low highway MPG is further impacted by the GX’s boxy shape, which isn’t exactly aerodynamic. It’s a trade-off most GX owners are willing to make.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Lexus GX 460 at $3,600. This calculation is based on driving 15,000 miles per year and using the national average fuel price for regular gasoline at the time of the estimate. Of course, your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and fluctuations in gas prices. But this $3,600 figure provides a useful benchmark for comparing the GX’s fuel expenses to other vehicles.

Real-world expectations

While the EPA estimates offer a good starting point, real-world fuel economy can vary. Drivers who spend a lot of time in stop-and-go traffic or frequently tow will likely see lower MPG than the EPA estimates. Those who primarily drive on the highway at consistent speeds might achieve slightly better fuel economy. Don’t expect miracles, though. Breaking the 20 MPG mark in real-world conditions will be a challenge. The GX is heavy, and its V8 needs to work to get it moving. Drivers report numbers close to the EPA’s figures, some a bit lower, so set your expectations accordingly.

How it compares

Compared to other luxury SUVs, the GX’s fuel economy is undeniably low. A similarly sized 2019 Acura MDX SH-AWD, for example, achieves an EPA-estimated 22 MPG combined with its V6 engine. The Land Rover Discovery, while offering similar off-road capability, manages around 18 MPG combined with its base engine. Even within the Lexus lineup, the RX 350 gets considerably better mileage, hovering around 23 MPG combined. The GX MPG across all years bears this out: this vehicle prioritizes truck-like attributes over efficiency. The GX buyer isn’t cross-shopping with the MDX or RX, though. They’re looking at the Toyota 4Runner TRD Pro, perhaps, another body-on-frame SUV with similar fuel consumption and off-road credentials. For those interested in all Lexus fuel economy data, the GX stands apart from the rest of the brand.

Tips to maximize efficiency

While the GX 460 isn’t known for its fuel efficiency, there are steps you can take to minimize fuel consumption. Avoid aggressive acceleration and braking, as these habits can significantly reduce your MPG. The GX’s V8 is responsive, but it’s also thirsty when pushed hard. Gradual acceleration will help keep fuel consumption in check.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and burn more fuel. Check your tire pressure regularly and inflate them to the recommended PSI listed on the sticker inside the driver’s side door. This is important if you frequently drive off-road and adjust your tire pressure for better traction.

Minimize unnecessary weight. Carrying extra cargo adds weight to the vehicle, which reduces fuel economy. Remove any unnecessary items from the vehicle, especially heavy objects, to improve your MPG. This is especially true if you’re frequently using the GX as a family hauler, as clutter can quickly accumulate.

Consider using cruise control on the highway. Maintaining a consistent speed can help improve your highway fuel economy. Cruise control can also help you avoid inadvertently speeding (and wasting fuel) on long drives.

Ensure your GX 460 receives regular maintenance. A well-maintained vehicle is a more efficient vehicle. Follow the manufacturer’s recommended maintenance schedule, including regular oil changes, air filter replacements, and tune-ups, will keep your engine running smoothly and efficiently.