Yes it does, though Lexus recommends 91-octane premium gas for “optimum performance.” lists the manufacturer’s fuel recommendations in its research reports  (under the Snapshot heading at the top), but there is some flexibility.


Lexus says the RX 350 will retard ignition timing to compensate for lower-octane gas to prevent engine knock (or “ping”), resulting in a small loss of horsepower. Lexus adds, “Drivers usually won’t notice the loss in horsepower unless they have a heavy foot on the accelerator and ask the vehicle for maximum performance.” Premium gas could also make a difference when the vehicle is fully loaded, pulling a trailer or driving through mountains.

Our advice: Try a few tanks of regular and then a few tanks of premium, and see if you notice any difference.

Learn more

Answered by Rick Popely on May 30, 2010 in Lexus , Lexus RX 350 | Permalink

Search Results Search Results for


See if your question has already been asked and answered

Thank You!

Your question has been successfully submitted to It will now be reviewed by our editors and we'll answer it soon if we think it's a useful question. You will be notified via e-mail when the answer is posted. tackles your questions about new cars and the car-buying process. Unfortunately we can't answer questions regarding:

  • Used cars.
  • Most aftermarket products.
  • Mechanical issues. You can visit our friends at Car Talk to discuss your mechanical problems.
Thanks for your interest.


Have our experts answer any of your questions about new cars.

Email us at

Maintenance Advice
Get answers from the
Car Talk Community