The 2019 Lexus RX 450h L AWD gets 29 MPG combined. That’s the fuel economy of a mid-size sedan in a three-row luxury SUV. This isn’t a vehicle bought by those seeking maximum efficiency at any cost. It’s for those who want luxury, ample space, and the image of driving something with less gas, without sacrificing practicality or their fuel budget.

City and highway performance

The EPA numbers for the RX 450h L are consistent, showing 29 MPG in the city and 28 MPG on the highway. This near-identical fuel efficiency results from the hybrid powertrain’s design, which uses electric power extensively in stop-and-go city driving and supplements the gasoline engine during highway cruising. The electric motor can assist or even fully propel the vehicle at lower speeds, minimizing gasoline consumption in urban environments. The slight dip on the highway likely reflects the increased demand on the gasoline engine at higher speeds, as the electric motor plays a smaller role once the vehicle is maintaining a steady speed.

Annual fuel cost

According to EPA estimates, the annual fuel cost for the 2019 Lexus RX 450h L AWD is $2,000. This figure is calculated based on driving 15,000 miles per year, using national average fuel prices. The EPA gives consumers a single, easily accessible figure for comparing vehicles. Real-world fuel prices will vary depending on your location.

Real-world expectations

While the EPA provides a standardized benchmark, your actual fuel economy might differ based on several factors. Driving style plays a significant role. Aggressive acceleration and frequent hard braking will negatively impact efficiency. The 3.5L V6 responds well to a light foot. Weather conditions are another factor. Colder temperatures can reduce hybrid battery performance and increase fuel consumption.

Consider the vehicle’s load, as regularly carrying passengers and cargo will reduce the vehicle’s MPG. With some care and attention to detail, most owners should easily achieve near the EPA’s estimates. The RX 450h L’s hybrid system works effectively when used as intended.

How it compares

The RX 450h L is competitive. The Acura MDX Sport Hybrid, another three-row hybrid SUV, offers slightly lower combined fuel economy at around 27 MPG. The Volvo XC90 T8 E-AWD Plug-In Hybrid achieves a more impressive 27 MPG combined, but that comparison is misleading because it’s a plug-in hybrid, requiring different charging habits. A non-hybrid like the BMW X5 xDrive40i, at around 23 MPG, makes the 450h L feel thrifty by comparison. Lexus can offer three rows of seating and still approach 30 MPG, and that is why the RX 450h L buyer is willing to pay a premium for the hybrid.

Tips to maximize efficiency

Use the RX 450h L’s Eco mode. This setting recalibrates the throttle response and climate control system to prioritize fuel efficiency. While it might slightly reduce acceleration, the impact on your MPG can be significant, especially in city driving. The “EV” mode, which forces the vehicle to run purely on electric power, can also be helpful but will disengage at higher speeds or when the battery runs low.

Gentle acceleration and braking are key to maximizing fuel economy in any vehicle, especially a hybrid. Anticipate traffic flow and avoid sudden stops or starts. Letting the regenerative braking system capture as much energy as possible will help recharge the hybrid battery and reduce the need for the gasoline engine to kick in.

Proper tire inflation is often overlooked but can make a noticeable difference in fuel efficiency. Check your tire pressure regularly and inflate them to the recommended level, which can be found on a sticker inside the driver’s side doorjamb or in the owner’s manual. Underinflated tires increase rolling resistance, which requires the engine to work harder and consume more fuel.

Minimize unnecessary weight in the vehicle. Remove any items you don’t need to carry regularly, as extra weight increases fuel consumption. Even a few pounds can add up, especially when driving in stop-and-go traffic. Routine maintenance, including oil changes and filter replacements, also ensures the engine operates efficiently.

Explore the all Lexus fuel economy data and compare it to other models. You can also analyze RX MPG across all years to see how this model has developed over time.