Does the Lexus RX Require Premium Gas?

Lexus RX

Whether you’ve chosen the sleek 2-row Lexus RX or the spacious RXL with seven seats, you’re behind the wheel of a vehicle that’s capable of providing a luxury experience in Larchmont, New Rochelle, and Yonkers, NY. Of course, you want to keep it running smoothly.

Does the Lexus RX require premium gas? That’s a question we’ve heard from many drivers over the years. You want to be sure you’re putting the right gasoline in your vehicle, of course. Continue reading to learn more and contact the Lexus of Larchmont team if you have any further questions.

Do I Need to Put Premium Gas in the RX?

Lexus RX Engine SpecsYou must only use unleaded gasoline in the RX, with an octane rating of 87 or higher. This means the Lexus RX does not require premium gasoline, as the premium octane rating is 91 or higher. Of course, you are free to put premium gas in your Lexus RX, as it can provide better performance, but it is not needed.

It’s worth noting that any gasoline used in the RX shouldn’t be higher than 15% in ethanol. If gasoline has more than 15% ethanol, or is called flex-fuel, it should not be used in your luxury Lexus SUV. It’s best to look for another option if you see this at the pump. Lexus also does not recommend using gas that contains methanol or MMT.

If gasoline with an octane rating of lower than 87 is used, it could lead to engine knocking noises. Consistent use of gasoline below this rating could lead to engine issues. Be sure you’re using the right gas for your RX.


The RX, when the right gasoline is being used, is an efficient SUV ready for highway and city travels. What can you expect from the RX when it comes to fuel efficiency? We’re glad you asked. See below for MPG ratings for RX front-wheel drive (FWD) models:

  • RX 350 FWD/RX 350 F SPORT FWD: EPA-estimated 20 city/27 highway MPG
  • RX 350L FWD: EPA-estimated 19 city/26 highway MPG

Of course, you can choose to equip your Lexus RX with all-wheel drive (AWD). If you choose to do that, this will change the MPG ratings:

  • RX 350 AWD/RX 350 F SPORT AWD: EPA-estimated 19 city/26 highway MPG
  • RX 350L AWD: EPA-estimated 18 city/25 highway MPG

We’ll Take Care of Your Lexus

Lexus RX Service

Of course, putting the right gasoline into your Lexus RX is just one way to ensure the best possible performance. Over time, certain services will need to be performed to make sure the engine is taken care of.

Of course, an oil change is at the top of the list. When your vehicle has not only the right amount of oil, but also the freshest oil possible, it can run efficiently. Conventional oil tends to break down after 5,000 or 7,500 miles of driving, though vehicles with synthetic oil like the RX may be able to last up to 10,000 miles between oil changes.

Schedule your next service appointment with us today!

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Ensure You Feed Your Lexus the Best

If you want to enjoy the roads, it’s important to take care of your Lexus RX. The Lexus RX does not require premium gas, but it must receive gas with an octane rating of at least 87.

When you’re at the gas station near Larchmont, New Rochelle, or Yonkers, New York, be sure to look for this octane level. Do you have questions for our Lexus of Larchmont team? We’re here to answer them.