25 MPG combined for the 2025 Lexus RX 350 isn’t a headline figure in the broader automotive landscape, but for a luxury mid-size SUV that prioritizes refinement, comfort, and unwavering reliability, it offers a good balance. This is the baseline efficiency for a vehicle that embodies accessible luxury, a segment where buyers expect a certain level of performance and quiet operation. Buyers are generally willing to accept a modest trade-off in fuel economy for those attributes. The RX 350 isn’t chasing hybrid heroics or supercar sprints; its mission is to deliver a quiet, upscale experience for families and individuals who value understated elegance and a worry-free ownership experience.

City and highway performance

The 2025 Lexus RX 350, powered by its 2.4L turbocharged four-cylinder engine and an 8-speed automatic transmission, achieves an EPA-rated 22 MPG in the city and 29 MPG on the highway. This split provides a clear picture of its operational characteristics. The city figure, 22 MPG, is respectable for a vehicle of its size and weight, navigating stop-and-go traffic and urban environments. The responsive nature of the turbocharged engine helps it feel agile in city confines, but frequent acceleration from a standstill will inevitably dip into that efficiency. On the open road, where the engine can settle into its cruising RPMs, the 29 MPG highway rating proves the RX 350 is a capable long-distance cruiser. It’s in this highway environment that the vehicle truly shines, offering a quiet, composed ride that makes extended journeys feel effortless. The power delivery is smooth and linear, never feeling strained, which contributes to both driver confidence and perceived efficiency.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,300 for the 2025 Lexus RX 350 2.4L 4-cyl. This figure is calculated based on an assumed 15,000 miles of driving per year, with a mix of city and highway travel, and using national average fuel prices, which the EPA updates regularly. For a buyer considering the RX 350, this $2,300 annual outlay represents a predictable and manageable expense within their overall cost of ownership. It’s a clear, transparent number that allows for direct comparison with other vehicles in its class, providing a realistic expectation of recurring fuel expenditure without exaggeration or downplaying. This transparency is important for the financially conscious luxury buyer who, while not necessarily penny-pinching, appreciates clarity in their vehicle’s running costs.

Real-world expectations

In real-world driving, owners of the 2025 Lexus RX 350 can generally expect to land very close to the EPA’s 25 MPG combined rating, perhaps a touch lower for those with a heavier right foot or primarily city driving. The 2.4L turbo engine, while potent, relies on sensible throttle inputs to achieve its peak efficiency. Aggressive acceleration and frequent high-speed cruising will certainly diminish those numbers. Conversely, drivers who embrace a smoother, more deliberate style, anticipating traffic and maintaining consistent speeds, may even find themselves exceeding the EPA’s highway projections. The RX 350’s powertrain is designed for refinement and smoothness, and that characteristic naturally encourages a more economical driving pattern. Those who bought an RX for its quiet comfort rather than its performance capabilities will be the ones seeing the best fuel returns. Owners aren’t typically buying this vehicle to push its limits, but to enjoy a premium, comfortable, and reliable daily driver.

How it compares

Comparing the 2025 Lexus RX 350’s 25 MPG combined rating to key competitors reveals its positioning within the mid-size luxury SUV segment. The Acura MDX, for instance, typically offers a 3.5L V6 engine and achieves around 22 MPG combined, making the RX 350 noticeably more efficient. The Genesis GV70, with its 2.5T powertrain, often lands closer to 24 MPG combined, putting it in a remarkably similar league to the RX. European rivals like the Mercedes-Benz GLC 300, despite its smaller size, often matches the RX 350 with about 25 MPG combined from its 2.0L turbo-four engine. The BMW X3 xDrive30i also hovers around 24-25 MPG combined, depending on the year and specific configuration. Buyers looking at the RX 350 are often cross-shopping these vehicles. The Lexus holds its own in terms of conventional powertrain efficiency, especially when considering its overall refinement and standard feature set. For a more efficient Lexus, buyers would naturally be drawn to the hybrid variants within the RX model line, but for a traditional gasoline engine, the RX 350 offers a competitive balance.

Tips to maximize efficiency

Maintaining proper tire inflation is one of the easiest ways to ensure your RX 350 delivers its best fuel economy. Refer to the placard on your driver’s side door jamb for the recommended pressures and check them regularly, as correctly inflated tires reduce rolling resistance and improve overall efficiency.

Adopting a smooth driving style will significantly impact your RX 350’s fuel consumption. Avoid rapid acceleration and hard braking; instead, anticipate traffic flow and allow the vehicle to coast when appropriate, making the most of the turbo engine’s gentle nature.

Consider using the RX 350’s Eco driving mode. While it may slightly dull throttle response, it optimizes transmission shift points and air conditioning operation to prioritize fuel savings, which is particularly beneficial in city driving or varied commuting conditions.

Minimize unnecessary weight in your RX 350. Every extra pound the engine has to move requires more fuel, so remove heavy items from the cargo area if they’re not needed for your current trip.

Keep up with scheduled maintenance, especially oil changes and air filter replacements. A well-maintained engine runs more efficiently, ensuring that your Lexus is always performing at its peak potential for fuel economy and overall reliability.