FAQ: Which Fuel Grade Should I Use?

This question comes up quite a bit, especially lately with recent fuel shortages.  Lexus recommends using Unleaded Fuel in every model, but the minimum octane rating does vary by model and, for some Lexus models, by the year.  Below is a list of all current models that need only the regular unleaded, 87 octane fuel and a list of the Lexus models with a premium unleaded, 91 octane fuel requirement.  IF you’re driving a model with a 91 octane requirement but cannot find a station with premium unleaded fuel, do not panic.  You can use a lower rating (just as long as it is unleaded) and your car will survive – go ahead and fuel up so you can get where you need to go then continue to use the required, higher octane the next time you need gas, or as soon as your favorite station has it available for you.

Regular Unleaded Fuel Requirement – 87 Octane

Lexus CT 200h – all model years (2011 – 2017)

Lexus ES 300h – all model years (2013 or newer)

Lexus ES 350 – 2012 or newer model years

Lexus NX 300h – all model years (2015 or newer)

Lexus RX 350 – 2012 or newer model years

Lexus HS 250h – all model years (2011-2012)

 

Driving the ESh.png
2012 or newer Lexus ES requires Regular Unleaded Fuel

 

Premium Unleaded Fuel Requirement – 91 Octane

TIP:  If you drive a Turbo or any Lexus model with an “F” at the end of it- then go ahead and use the highest fuel grade available – keep those twin turbos spinning & maintain optimal performance.

Lexus GS 200t – all model years (2016 or newer)

Lexus GS 350 – all model years

Lexus GS F – all model years

Lexus GX 460 – all model years

Lexus IS 200t – all model years (2016 or newer)

Lexus IS 250 & IS 250c – all model years

Lexus IS 300 – all model years (2016 or newer)

Lexus IS 350 & IS 350c – all model years

Lexus IS F – all model years

Lexus LS 460 – all model years

Lexus LS 600h – all model years

Lexus LX 570 – all model years

Lexus NX 200t – all model years

  • Lexus NX 300  (2018 or newer – although it has a new name, it’s still a twin turbo engine)

Lexus RC 200t – all model years (2016-2017)

Lexus RC 300 – all model years (2016 or newer)

Lexus RC 350 – all model years

Lexus RC F – all model years

Lexus RX 450h – all model years

**  Lexus RX 3502011 Models or older

Lexus LC – all model years

Basically, if you drive a GS, IS, RC coupe, LS, GX or LX – always use the higher octane fuel so you can get the performance and fuel economy these models should give you.

When in doubt you can always reference your owner’s manual or just give us a call at 210-816-5000 to speak with our service team at North Park Lexus Dominion.

 

Lexus-RC-350-infrared-gallery-overlay-1204x677-LEXRCGMY160021
The RC coupe and other high-performance models require a higher octane unleaded fuel for peak performance.

 

 

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19 thoughts on “FAQ: Which Fuel Grade Should I Use?

  1. I owned since new a 2002 430 and a 2010 460 and never used higher than 87 octane (except probably for the first full tank from the dealer) – each car ran with no problems whatsoever. My most recent MPG check on my 460 at 225K miles was 24.7 highway (with about 30 miles off highway at end of trip). I am now ready to get a new car and am considering the LS500 but dealer after dealer has warned that I must never use below 91 (we don’t have 91 where I live in Massachusetts – only 93). What’s the real story? Can I try 89 or even 87? What’s the worst that could happen? (I don’t want to go from 0-60 in 4.8 seconds). I just can’t stand the idea of spending fifty cents extra per gallon (I often get two fill-ups per week), If I wasted that money on my last two LS (as the manual said) I wouldn’t be able to afford a 500 today! BTW, I don’t like the ride of the 500 that much but I’m kind of committed to the Lexus brand. Thoughts, anyone? Thanks.

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    1. You will get the performance and fuel economy the LS 500 is engineered to deliver if you use the Premium Unleaded Fuel. You can use the lower octane fuel as you want, but know that this can affect your MPG and performance.

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  2. trey

    I have a 2011 GS 460. Discussion of gas prices and luxury cars in office here. I am being told that I do not need to put premium gas, just regular unleaded in my gas tank. 117,000 miles. Proper maintenance done on car throughout years.

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    1. You are correct that your Lexus will run and operate on regular unleaded – 87 octane fuel however you will get better performance and fuel economy using the recommended gas level. Ultimately up to you! Thanks!

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    1. Lexus recommends using the higher octane, especially so you get the performance and MPG ratings however you car will survive just fine as long as you use at least the 89 octane. The decision on fuel grade to use is ultimately up to you. Thank you!

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  3. leo

    I just got an IS250 2008,I have accidentally been using 87 regular gas until i noticed that it requires premium gas.Hope this wont affect my car in a bad way.

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  4. Hi, I have an ES 350 model 2018 in Florida and I am using 87 octane. After finishing my studying in Florida, I am heading to my home which is Saudi Arabia. In Saudi we have two types of fuel 91 octane and 95 octane. Which one should I use?

    My friends whom have the same cars have been told that the local Lexus Service Center said they should use 95 octane, but I thing this is totally wrong.

    Your advice?

    Thanks.

    Liked by 1 person

    1. I would think the 91 Octane is enough considering it is higher than what the US regular unleaded is and that is all the ES needs. Maybe ask the Lexus Service Center in Saudi Arabia when you get back to make sure? Hope this helps! Thank you!

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