15 MPG combined. That’s dismal. It’s also largely irrelevant to the target demographic of the 2017 Lexus LX 570 5.7L 8-cyl. This isn’t a vehicle bought for its frugality; it’s purchased for its bank-vault solidity, its off-road capability inherited from the Land Cruiser, and its ability to project a certain image. Lexus LX buyers prioritize capability and presence over penny-pinching, accepting the fuel economy as the price of admission.

City and highway performance

The EPA estimates for the LX 570 are 13 MPG in the city and 18 MPG on the highway. The city figure, influenced by stop-and-go traffic and the LX’s considerable weight (over 6,000 pounds), is particularly painful. Urban driving is where many LX owners spend a significant portion of their time. The highway number, while better, still represents a substantial fuel bill on long road trips. The 5.7-liter V8 works hard to move this behemoth, and that effort translates directly into fuel consumption. The smooth-shifting eight-speed automatic transmission does its best, but it can’t defy the laws of physics.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2017 Lexus LX 570 is $3,850. This calculation is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. It’s a hefty sum, dwarfing the fuel bills of more efficient SUVs and even exceeding those of some pickup trucks. This cost should be factored into the total cost of ownership, ensuring that prospective buyers are fully aware of the financial commitment they’re making when purchasing this vehicle. For those curious about all Lexus fuel economy data, there’s plenty to explore.

Real-world expectations

While the EPA figures provide a baseline, real-world fuel economy can vary considerably depending on driving style, terrain, and vehicle load. Aggressive acceleration, frequent hard braking, and carrying heavy cargo will all negatively impact MPG. And driving at higher speeds on the highway can reduce fuel economy below the EPA estimate. Owners who frequently tow or venture off-road should anticipate even lower numbers.

Conversely, a gentle driving style and careful route planning can potentially improve fuel economy, though achieving the EPA estimates consistently will be a challenge.

How it compares

The LX 570’s fuel economy struggles against other SUVs. The Cadillac Escalade, with its 6.2L V8, manages a slightly better 17 MPG combined. The Lincoln Navigator, particularly the newer models, demonstrates improved efficiency, offering up to 19 MPG combined with its turbocharged engine, but premium fuel is recommended. Even the Infiniti QX80, a close relative both mechanically and in terms of target audience, achieves a similar 15 MPG combined with its 5.6L V8. These comparisons are important because they highlight that while the LX’s fuel economy is poor, it’s not drastically out of line with its direct competitors in the full-size luxury SUV segment. Those wanting more information on LX MPG across all years can find it here.

Tips to maximize efficiency

Keep your tires properly inflated. The LX 570 has large, heavy tires, and maintaining the correct pressure minimizes rolling resistance and improves fuel economy. Check your tire pressure regularly, especially during temperature changes.

Drive smoothly and avoid aggressive acceleration. The LX 570’s 5.7-liter V8 delivers ample power, but exploiting it unnecessarily drains fuel. Anticipate traffic flow, maintain a steady speed, and avoid hard braking whenever possible. Using the cruise control on the highway can also help maintain a consistent speed and improve fuel efficiency.

Remove unnecessary weight. Carrying extra cargo adds to the vehicle’s load and reduces fuel economy. Clear out any items you don’t need, especially heavy objects in the cargo area. Even minor weight reductions can make a difference over time.

Consider using premium fuel. While the LX 570 doesn’t require premium fuel, some owners report slightly improved fuel economy and performance when using it. Experiment to see if it makes a noticeable difference in your driving conditions, but be aware that the cost of premium fuel may outweigh any potential benefits.