Does the 2007 Lexus RX 400h 4WD take premium or regular gas?

The EPA lists the 2007 Lexus RX 400h 4WD 3.3L 6-cyl, CVT automatic, AWD as taking premium. Combined MPG is 26, and at today's gas prices that's about $2,700 a year in fuel.

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2007 Lexus RX 400h 4WD — 3.3L 6-cyl, CVT automatic, AWD

This 2007 Lexus RX 400h 4WD (3.3L 6-cyl, CVT automatic, AWD) takes premium gasoline. PREMIUM

MPG combined (27 city / 25 hwy)

$2,700

est. fuel cost / year (today’s prices, 15k mi)

—

tailpipe CO₂

At today's AAA national average price ($4.68/gal, 2026-07-05) — the EPA's own price/date assumption isn't exposed in the public dataset, so we recompute this from the EPA's MPG figure and a sourced current price.

This 2007 model was originally EPA-tested under the pre-2008 2-cycle method, which didn't account for highway speeds over 60 mph, air-conditioner use, or cold starts. When EPA overhauled the test for model year 2008, city ratings fell by about 12% and highway by about 8% on average industry-wide — and EPA retroactively adjusted every 1984-2007 rating to the stricter standard so old and new cars could be compared fairly. The MPG above is already on that modern scale — the window sticker on this car when it was new likely showed a higher, pre-2008-method number.

The EPA lists this trim as premium because that's the fuel the manufacturer specified for its mileage test. Many such engines will run on regular with slightly lower power and MPG — but check your owner's manual to see whether premium is required or just recommended.

EPA fuel type: Premium · class: Sport Utility Vehicle - 4WD · engine: 3.3L 6-cyl · transmission: CVT automatic · drive: AWD · MPG retrieved 2026-07-24.