23 MPG combined isn’t a number to boast about in 2024, but it reflects the priorities of the typical 2020 Lexus RX 350 buyer. These owners aren’t overly concerned with maximizing every last mile per gallon. Instead, they value reliability, comfort, a smooth ride, and a quiet cabin. They want a dependable luxury SUV that will last, and they’re willing to accept average fuel economy to get it.

City and highway performance

The 20 MPG city rating shows the RX 350’s struggles in stop-and-go traffic. The 3.5L V6 engine, while proven and durable, works harder in urban environments, which impacts fuel consumption. Frequent acceleration and idling take their toll. However, the 27 MPG highway figure is where this vehicle excels. On long, steady drives, the RX 350 is comfortable, the engine sips fuel efficiently, and the miles pass by peacefully. The smooth eight-speed automatic transmission contributes to this efficiency by keeping the engine in its optimal power band at highway speeds. Lexus engineered this powertrain for smooth, effortless performance, and the fuel economy reflects that.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Lexus RX 350 at $1,900. This calculation is based on driving 15,000 miles per year, using a national average fuel price. This is an estimate, and your actual fuel costs will vary depending on your driving habits, the type of driving you do, and the price of gasoline in your area. Drivers who primarily commute in congested city environments will likely exceed this figure, while those who predominantly drive on the highway might spend less. Also, remember that this figure may change depending on fluctuations in gas prices.

Real-world expectations

The EPA estimates provide a useful baseline, but real-world fuel economy often differs. Many RX 350 owners report achieving figures close to the EPA estimates, yet driving style is significant. Aggressive acceleration and frequent hard braking will reduce fuel economy, while a gentler approach will produce better results. Terrain also matters; driving in hilly areas will increase fuel consumption. Monitoring driving habits and routes can help achieve the best possible fuel economy from your RX 350. For Lexus fuel economy data, check out the FuelEconomyHub resource page.

How it compares

The 2020 Lexus RX 350 isn’t a class leader in fuel economy. The Acura MDX, another popular luxury SUV with a V6 engine, achieves a similar 22 MPG combined rating. However, the Volvo XC60 T5, with its turbocharged four-cylinder engine, gets an impressive 25 MPG combined. The BMW X3 sDrive30i, another four-cylinder competitor, also edges it out with 27 MPG combined. The RX 450h, the hybrid version of the RX, offers much better fuel economy, with an EPA rating of 31 MPG combined. This choice reflects how important fuel economy is to you. The RX 350 buyer recognizes they’re sacrificing some fuel efficiency for the smooth power delivery and proven reliability of the V6 engine. The RX MPG across all years can give you insight to prior years comparisons.

Tips to maximize efficiency

Avoid aggressive acceleration and hard braking. The RX 350’s V6 engine responds best to smooth inputs. Accelerating gently and anticipating traffic conditions will help minimize fuel consumption. Use cruise control on the highway to maintain a consistent speed and optimize fuel efficiency, especially on long trips. Avoiding sudden speed changes allows the engine to work as efficiently as possible.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure as listed on the door jamb sticker. It’s wise to check your tires frequently, especially if you plan to take a long trip.

Reduce unnecessary weight. Carrying extra weight negatively impacts fuel economy. Remove any unnecessary items from your trunk or cargo area. Even small amounts of extra weight can hurt overall fuel consumption.

Consider using a fuel additive designed to clean fuel injectors. Fuel injectors can become clogged, which can reduce engine efficiency and fuel economy. A fuel additive can help clean the injectors, restoring optimal performance.

Plan your trips efficiently. Combining multiple errands into a single trip can help reduce cold starts, which consume more fuel. Mapping out your route in advance and avoiding congested areas can also improve fuel efficiency. A single long drive consumes less fuel, comparatively, than multiple short drives.