The 2020 Lexus RX 350 L AWD gets 21 MPG combined, according to EPA estimates. While not class-leading, especially with the rise of hybrid SUVs, many buyers find it acceptable because of Lexus’s reputation for reliability, a smooth and quiet ride, and the availability of a third row for occasional use.

City and highway performance

EPA estimates for the 2020 Lexus RX 350 L AWD are 18 MPG in the city and 25 MPG on the highway. This reflects the 3.5-liter V6 engine, which focuses on smooth power delivery rather than maximum efficiency. The eight-speed automatic transmission is well-matched to the engine, offering smooth shifts that help create a relaxed driving experience, but it’s not designed for maximum fuel savings. Stop-and-go city driving, with frequent acceleration and braking, reduces fuel economy. On the open road, the RX 350 L AWD performs better and can settle into a comfortable cruise, though its all-wheel-drive system constantly uses some power. The vehicle’s weight and less aerodynamic shape also contribute to its fuel consumption, particularly at higher speeds.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,100 for the 2020 Lexus RX 350 L AWD. This is based on driving 15,000 miles per year, with a mix of city and highway driving, using the national average fuel price. Keep in mind, your actual fuel costs may vary based on your driving habits, the type of fuel you use, and the price of gasoline in your area. However, it provides a benchmark for comparing fuel costs of different vehicles. Anyone looking at all Lexus fuel economy data needs to consider this number when making a decision.

Real-world expectations

EPA estimates provide a baseline, but real-world MPG can differ. Drivers who frequently accelerate quickly, brake hard, or idle for long periods will likely see less gas mileage. Similarly, driving in hilly areas or carrying heavy items can decrease MPG. However, those who drive more conservatively, accelerate smoothly, and minimize idling may achieve numbers closer to or even slightly better than the EPA estimates. Tire pressure is also important. Properly inflated tires reduce rolling resistance and improve fuel economy. The RX 350L is a larger vehicle, and its size and weight affect its fuel efficiency.

How it compares

The 2020 Lexus RX 350 L AWD’s fuel economy is average compared to its rivals. The Acura MDX (non-hybrid) typically gets around 22 MPG combined, slightly better. The Infiniti QX60 gets around 21 MPG. The Volvo XC90 B5, while offering more space, achieves 24 MPG combined. However, these competitors may not have the reliable reputation of the Lexus. Hybrid versions of these SUVs, such as the Lexus RX 450hL (30 MPG combined), offer much better fuel economy but cost more initially, a factor for the RX 350 L AWD buyer to consider. Knowing this RX MPG across all years is critical for prospective buyers.

Tips to maximize efficiency

Consistent maintenance is important for optimizing fuel economy in the RX 350 L. Follow Lexus’s recommended maintenance schedule, especially oil changes, air filter replacements, and spark plug maintenance. A well-maintained engine runs more efficiently, leading to better MPG.

Think about your drive mode. The RX 350 L has different drive modes, including an “Eco” mode. Selecting this mode adjusts the engine and transmission settings to focus on fuel efficiency. Throttle response is slightly reduced, and shift points are optimized for lower RPMs, improving MPG, especially in city driving.

Pay attention to tire pressure. Keeping the recommended tire pressure, found on a sticker on the driver’s side doorjamb, reduces rolling resistance and maximizes fuel efficiency. Regularly check and adjust your tire pressure, especially when the temperature changes, since tire pressure can fluctuate with the weather.

Consider the weight you are carrying. More weight in your vehicle reduces your MPG. Only carry essential items to maximize the vehicle’s MPG.