Buying the 2019 Lexus RX 350 L AWD means accepting a combined 21 MPG. While not the worst for a three-row luxury SUV, it’s far from class-leading. This vehicle prioritizes a smooth, quiet ride, a comfortable interior, and the legendary Lexus reliability over maximum fuel efficiency. The RX 350 L buyer requires the extra seating for kids, carpools, or the occasional visitor, and accepts the middling fuel economy as a cost.

City and highway performance

The EPA estimates 18 MPG in the city and 25 MPG on the highway for the 2019 Lexus RX 350 L AWD. The city figure reflects stop-and-go traffic, where the 3.5L V6 engine works harder and the eight-speed automatic transmission shifts more often. On the open road, the RX 350 L performs better, cruising comfortably at highway speeds.

The 25 MPG rating is achievable with a light foot and consistent speeds, but aggressive acceleration or hilly terrain will quickly diminish those figures. The all-wheel-drive system provides extra traction in bad weather and also lowers fuel economy compared to front-wheel-drive models.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Lexus RX 350 L AWD at $2,100 per year. This is based on driving 15,000 miles per year and using national average fuel prices. Your actual fuel costs will depend on your driving, your driving habits, and the price of gasoline in your area.

For example, drivers who commute in heavy traffic will likely exceed the $2,100 estimate, while those who do mainly highway driving may spend less. It is a useful figure for comparing against other vehicles.

Real-world expectations

EPA estimates provide a baseline, but real-world fuel economy often differs. Some drivers report slightly lower figures than the EPA estimates in mixed driving. This is from aggressive driving, carrying extra weight, and using accessories like air conditioning. Drivers who prioritize fuel efficiency and drive carefully have reported achieving figures closer to, or even slightly above, the EPA estimates. If you want to maximize your RX MPG, paying attention to driving habits and vehicle maintenance can make a difference.

How it compares

The 2019 Lexus RX 350 L AWD’s fuel economy isn’t exceptional compared to other three-row luxury SUVs. The Acura MDX SH-AWD achieves a similar 20 MPG combined. The Infiniti QX60 manages a slightly better 22 MPG combined. Some might cross-shop the Buick Enclave, which gets 20MPG with AWD. Even the Volvo XC90 B6 AWD manages 22 MPG combined. The Lexus reputation for reliability often outweighs the slightly lower MPG for buyers seeking peace of mind and lower long-term ownership costs. These competitors might offer a slight fuel cost advantage, but they often have different interior experiences or reliability reputations that matter to buyers.

Tips to maximize efficiency

Anticipate traffic flow and avoid sudden acceleration and braking. The RX 350 L’s smooth powertrain responds best to a gentle touch. Rapid acceleration burns more fuel from a standstill. Maintaining a steady speed, especially on the highway, will significantly improve your MPG.

Ensure your tires are properly inflated to the recommended pressure. Underinflated tires create more rolling resistance, which reduces fuel economy. Check your tire pressure regularly, especially during temperature changes, as this affects inflation levels. You can find the correct tire pressure on a sticker inside the driver’s side doorjamb.

Reduce unnecessary weight in the vehicle. Extra weight increases the engine’s workload and lowers fuel economy. Remove items you don’t need, such as sports equipment, tools, or luggage, from the trunk. This can make a small but noticeable difference.

Use cruise control on the highway whenever possible. A consistent speed helps optimize fuel efficiency. This is effective on long, flat stretches of road where there’s minimal traffic. Avoid using cruise control in hilly areas, as the system may downshift frequently, negating its fuel-saving benefits.

Keep up with regular maintenance. A well-maintained engine runs more efficiently. Follow the manufacturer’s recommended maintenance schedule, including oil changes, air filter replacements, and tune-ups. These steps impact your fuel economy and overall vehicle performance. You can review all Lexus fuel economy data to understand the broader context of Lexus efficiency.