For instance, is the 5.7L in the LX exactly the same as the 5.7L in the Land Cruiser? Is the 3.5 in the ES exactly the same as the 3.5 in the Camry XLE V6? I'm wondering because Lexus tends to specify premium gas, while Toyota tends to specify regular gas. Is the premium really needed, if it regular is good enough on the Toyota side?

The engines in the IS, GS, LS, new RX, and SC are Lexus specific but the engines in the LX, GX, and ES are the exact same as their Toyota counterparts.

The IS, GS, and LS have higher compression, direct injection engines that truly require premium fuel. The others "recommend it" mostly to achieve the advertised horsepower rating though it might make you run .01% smoother in some instances.

There may be some software difference that lets the Lexus engines take advantage of the higher octane.

2GR-FE =

* 2005- Toyota Avalon
* 2006- Toyota Aurion
* 2007- TRD Aurion (Eaton Twin-Vortices TRD supercharger)
* 2006- Toyota RAV4 V6
* 2006- Toyota Estima V6
* 2007- Toyota Previa V6
* 2007- Toyota Tarago V6
* 2007- Toyota Camry V6
* 2007- Toyota Sienna
* 2007- Lexus ES 350
* 2007- Lexus RX 350
* 2007- Toyota Kluger
* 2007- Toyota Blade Master
* 2007- Toyota Mark X Zio
* 2008- Toyota Alphard V6
* 2008- Toyota Highlander
* 2009- Toyota Venza V6
* 2009- Lotus Evora (280ps & 350Nm using Lotus engine management)
* 2010- Lexus RX 350 (updated to 275 hp)
* 2010- Lexus RX 450h (Atkinson cycle VVT-i)


2GR-FSE =

* 2006 Toyota Crown Athlete (Japan)
* 2006 Lexus GS 350 (Japan)
* 2006 Lexus GS 450h
* 2006 Lexus IS 350 (Japan and United States)
* 2007 Lexus GS 350 (United States)


1UR-FSE =

* 2007 Lexus LS 460 & LS 460 L
* 2009 Toyota Crown Majesta


1UR-FE =

* 2007 Lexus LS 460 & LS 460 L (Middle East)
* 2008 Lexus GS 460
* 2010 Toyota Tundra (310 HP)


3UR-FE =

* 2007 Toyota Tundra
* 2008 Toyota Sequoia
* 2008 Toyota Land Cruiser 200 Series - US market only
* 2008 Lexus LX 570

Don't forget about the:

2UR-FSE = Lexus LS600h

2UR-GSE = Lexus IS-F

Yeah, but those engines are not shared by any other Toyota product. It's pretty exclusive...

There's been a lot of discussion about this on the ES350 forum and what grade of gas to use. The ES350 is rated at 272hp on premium, and the 3.5 V6(non-DI) in Toyota products (Camry, Avalon, RAV4, Venza, Sienna etc.) is rated at 268-270 hp on regular. It is my understanding too that premium is recommended to achieve the advertised hp.

I need to get on memorizing these engine codes.....Good posts Phil and Mr. Johnson

don't forget the Lotus Evora getting the 2GR-FE

What about the GX470 and the V8 4Runner

Those would be the 2UZ-FE

Oops. I forgot those...

Thanks for the info, everyone. Re the above, since the 3.5L in the RX450h isn't identical to those in the other models listed, would it be a good or bad idea to use regular gas?

wikipedia.org is your friend

its nowhere close to being indentical - i suggest that you run gas specified by lexus.