pagemaster

LX owners.

What octane are you using?

and what octane is required?

V8_Fan

Use 91. 87 or better is required for the '03. For the '98-02, 91 is "required." It's all in the owner's manual. I get about 2mpg better w/ 91 vs 87 (hilly terrain, 2500 ft alt.) since you don't need to step on the accelerator as much to get the rig moving. 2mpg is over 10% better economy, yet the price of 91 is only 20 cents/gallon more (with gas at $3/gal for 87, that's only 6.6% additional cost for 10%+ gain in fuel economy...a good deal!)

LEXveryG8

use octane 91. but in other countries, theres octane higher than 95

Jayson

I love it when the fuel-octane thread pops up every 6 months or so!

I use 87 out here in Central Texas.

pagemaster

I don't have a Lx but I am trying to figure out why my Tundra can use 87 but the LX is supposed to require 91...Does not make a whole of sense because they are the same engines.

Jayson

I believe the debated answer to that is the fact that by burning the higher octane, the engine performs supposedly performs at it's best and dare I say, quieter?

I read Jim's post and honestly had no idea that the 98-02 models required premium, yikes! I'm glad we bought an '03.

V8_Fan

Different engine chip. After all, the LX is full-time 4wd and weighs a lot more.

lexusrott

I drive a 2006 LX470 and use 93 Octane , yes is a few extra pennies per tank but using High Test it drive very smooth.
I travel lots of highway mileage a few times I have recorded 20 mpg on High Octane gas, Exxon , Chevron or Shell.
As soon as the new LX570 arrive in Florida I will be a candidate to purchase one.
On the other hand I owned a 2003 Land Cruiser for three years and always used Regular with no problem .
I got gun shy with the LX. Go figure !!!!!

Hoser

Other countries also often have a different octane rating system. I'm not saying 95 is impossible to get because I can even get 115 octane locally. Just that you have to compare apples to apples.

Lexus "recommends" premium fuel (91 or greater) for 98-02 but they also say you can run regular 87 without damage but with reduced performance.

idsrvit

I have a 99 that I purchased 4 years ago (used obviously) and have used nothing but 87 since. The guy that I purchased it from said he used 87 since his ownership...and that is what a friend who owned a Land Cruiser told me to use. My car has 118k plus miles and still rides like new.

jcasazza

91 is not "Required". the manual says if 91 isnt available in you area you may use lower octane.

V8_Fan

I'm still using Chevron 91, $3.14/gal this morning here in Tucson.

AKoch

87, 89, 91... whatever is the mood of the day. The engine does not care that much, just slightly higher gas consumption with the 87 and slightly smoother revs with the 91.

Da Hapa

Unfortunately thanks to my friends at CARB, those of us in CA are limited to 91 octane for super unleaded. You can find racing gas (100 octane) but that's overkill and really expensive.

We stick to 91 octane. It seems to give a little bit better mileage and it's the recommended octane per Toyota/Lexus.

V8_Fan

I remember years ago that Union 76 gas stations in CA sold 93 octane.