Owners of the 2015 Lexus RX 350 get 21 MPG combined. This isn’t a sports car or a hyper-efficient hybrid; it’s a mid-size luxury crossover, and that fuel economy reflects its mission of providing a smooth, comfortable, and reliable experience for families. While not class-leading, this figure represents a balance that RX 350 buyers willingly accept in exchange for the vehicle’s other virtues.

City and highway performance

The EPA estimates are 18 MPG in the city and 25 MPG on the highway for the 2015 RX 350. These figures show how the vehicle performs in different driving conditions. The relatively lower city MPG is typical for non-hybrid vehicles of this size, as stop-and-go traffic and lower speeds use more gas. The highway figure is more respectable, indicative of the RX 350’s ability to cruise comfortably and efficiently on longer journeys. The 3.5L V6 engine, mated to a smooth 6-speed automatic transmission, delivers adequate power for passing and merging, but it’s not geared towards fuel-sipping.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2015 Lexus RX 350 is $2,100. This calculation is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind that this is only an estimate; your actual fuel costs will vary depending on your driving habits, the type of fuel you use, and local fuel prices. However, it provides a good benchmark for budgeting purposes and for comparison against other vehicles you might be considering. For users looking into all Lexus fuel economy data, this number will provide some context.

Real-world expectations

Knowing the difference between EPA estimates and real-world experience is critical. Many 2015 RX 350 owners report achieving figures close to the EPA’s numbers, particularly on longer highway trips. However, aggressive driving, frequent short trips, and consistent use of features like air conditioning can negatively impact fuel economy. The age and condition of the vehicle also play a role.

Older RX 350s with neglected maintenance may not perform as efficiently as newer, well-maintained examples. Prospective owners should browse forums and owner reviews for a broader picture of what to expect in their specific driving situations. You’ll find more on RX MPG across all years here.

How it compares

The 2015 Lexus RX 350’s fuel economy places it in the middle of the pack compared to its competitors. The Acura MDX (non-hybrid) of the same year achieves a similar 20 MPG combined, while the BMW X5 xDrive35i delivers slightly lower figures at 19 MPG combined. The Audi Q5, particularly with its 2.0T engine, can achieve a marginally better 22 MPG combined, a difference that might sway buyers prioritizing lower fuel costs. The RX 350’s strengths lie in its reliability, comfortable ride, and strong resale value, factors that are often higher priorities for its target demographic than squeezing out every last mile per gallon. The hybrid versions of the RX, which were available at that time, offered improved fuel economy.

Tips to maximize efficiency

Gentle acceleration and smooth braking are important for fuel conservation in the RX 350. Avoid abrupt starts and stops, anticipating traffic flow to maintain a steady pace. The smooth six-speed automatic is optimized for efficiency, but aggressive driving cancels out its benefits. Think ahead and drive smoothly.

Proper tire inflation is another easy way to improve fuel economy. Check your tire pressure regularly and maintain it at the recommended level, which can be found on a sticker inside the driver’s side doorjamb. Underinflated tires create more rolling resistance, forcing the engine to work harder and consume more fuel.

Reduce unnecessary weight in the vehicle. Carrying around excessive cargo adds strain on the engine, impacting fuel efficiency. Remove any items you don’t need, particularly heavy objects in the trunk. A lighter load means the engine works less to move the car.

Regular maintenance is key to performance. Ensure that your RX 350 receives timely oil changes, air filter replacements, and other recommended services. A well-maintained engine runs more efficiently. Perform regular maintenance per the schedule.

Use cruise control on the highway whenever possible. Maintaining a consistent speed minimizes unnecessary acceleration and deceleration, which can improve fuel economy on long drives. The RX 350’s comfortable ride makes it perfect for road trips and cruise control can make them more economical too.