2027 RX fuel economy by trim

From lexus.com's 2027 RX trim comparison (16 trims), read November 2, 2026. Actual mileage will vary.

The EPA records behind the numbers

Miles per gallon. From fueleconomy.gov (U.S. EPA and Department of Energy) records for the 2026 Lexus RX, read November 2, 2026: the RX 350 versions are 2.4L turbocharged four-cylinders with an 8-speed automatic, the RX 350h a 2.5L four-cylinder hybrid with a continuously variable automatic, and the RX 500h a 2.4L turbocharged hybrid with a 6-speed automatic. On that date fueleconomy.gov listed no 2027 RX and no RX 450h+ record; the 2027 ratings lexus.com quotes for these four versions match the 2026 records.

Four powertrains

RX 350: lexus.com lists a 2.4-liter turbocharged in-line four with 275 horsepower, offered with front-wheel drive (Premium, Premium+, Luxury and F SPORT Design) or all-wheel drive (those four plus F SPORT Handling). AWD costs 1 mpg in city, highway and combined ratings.

RX 350h: an in-line four hybrid with 246 net combined horsepower and all-wheel drive on all four trims, rated at 37 mpg city, 34 highway and 36 combined. It is the most fuel-efficient RX measured in mpg.

RX 450h+: a plug-in hybrid with 304 net combined horsepower and all-wheel drive, in Premium and Luxury trims. Lexus.com describes it as offering all-electric driving for shorter trips and hybrid operation for longer journeys, and lists an 85 MPGe estimate. MPGe is a different measure from mpg, so it is not a like-for-like comparison with the other RX models.

RX 500h F SPORT Performance: a 2.4-liter turbo in-line four hybrid with electric front and rear motors, 366 net combined horsepower and DIRECT4 all-wheel drive. Lexus.com lists 0-60 mph in 5.9 seconds and 27 mpg combined.

Why your RX's MPG drops in winter

Fueleconomy.gov says conventional gasoline vehicles can expect a 10% to 20% fuel economy loss in city driving and 15% to 33% on short trips in cold weather, and hybrids typically 20% to 40% in city driving and 25% to 45% on short trips. Its reasons:

From fueleconomy.gov's Fuel Economy in Cold Weather page, read November 2, 2026.

Getting closer to the rated numbers

Fueleconomy.gov's cold-weather advice: park in a warmer place such as a garage, combine trips so you drive less often with a cold engine, keep warm-up idling short (it notes most manufacturers recommend driving off gently after about 30 seconds), use seat warmers and defrosters only as needed, check tire pressure regularly, use the oil your manufacturer recommends for cold weather, and remove roof racks when you are not using them.

Year-round, it says aggressive driving (speeding, rapid acceleration and braking) can lower gas mileage by roughly 15% to 30% at highway speeds and 10% to 40% in stop-and-go traffic, that mileage usually decreases rapidly above 50 mph, and that an extra 100 pounds in a vehicle could reduce mpg by about 1%.

Lexus of Peoria hours

From Lexus of Peoria's website, November 2, 2026. Holiday hours can differ.