Fuel discussions/questions - Octane Regular or Premium (merged threads)
#421
I mostly use shell 87. My GX is pre own so I am guessing that the guy who leased it most likely used 87 as well. I have not noticed any issue so far and I have about 90k miles. My recent Blackstone oil analysis came back good and no concerns.
Just my experience so far and but YMMV.
Just my experience so far and but YMMV.
#422
Super Moderator
Controversial topic but admit I always use Premium in mine.
There is an interesting thread over on iH8Mud where certain knock values were tracked between grades and there was a fluctuation in values
https://forum.ih8mud.com/threads/gx4.../post-13998772
Some day we will get some stock dynos :-)
I've brought this up before but have wondered if lower HP/Torque ratings in other markets are based on market tune or potentially lower octane fuel.
There is an interesting thread over on iH8Mud where certain knock values were tracked between grades and there was a fluctuation in values
https://forum.ih8mud.com/threads/gx4.../post-13998772
Some day we will get some stock dynos :-)
I've brought this up before but have wondered if lower HP/Torque ratings in other markets are based on market tune or potentially lower octane fuel.
#423
Controversial topic but admit I always use Premium in mine.
There is an interesting thread over on iH8Mud where certain knock values were tracked between grades and there was a fluctuation in values
https://forum.ih8mud.com/threads/gx4.../post-13998772
Some day we will get some stock dynos :-)
I've brought this up before but have wondered if lower HP/Torque ratings in other markets are based on market tune or potentially lower octane fuel.
There is an interesting thread over on iH8Mud where certain knock values were tracked between grades and there was a fluctuation in values
https://forum.ih8mud.com/threads/gx4.../post-13998772
Some day we will get some stock dynos :-)
I've brought this up before but have wondered if lower HP/Torque ratings in other markets are based on market tune or potentially lower octane fuel.
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darkoozy (09-27-21)
#425
Lexus Fanatic
iTrader: (1)
I spoke to a Lexus master tech years ago about this same topic in regards to my old LS400 and 430. I was told that over time the use a 87, in an engine tuned to be most efficient on 91/ 93, will cause the catalytic converters to fail prematurely. By pulling timing to prevent knock you are creating a less than ideal combustion and a bit of fuel gets pushed through the exhaust. Eventually this will gum up the cats and they will be done. Yes, this same engine is used in other Toyota products with 87 being OK but the tuning is different. You really want the vehicle to run as efficiently as possible and not be pulling timing.
Last edited by Lavrishevo; 08-13-21 at 10:06 AM.
#426
I spoke to a Lexus master tech years ago about this same topic in regards to my old LS400 and 430. I was told that over time the use a 87, in an engine tuned to be most efficient on 91/ 93, will cause the catalytic converters to fail prematurely. By pulling timing to prevent knock you are creating a less than ideal combustion and a bit of fuel gets pushed through the exhaust. Eventually this will gum up the cats and they will be done. Yes, this same engine is used in other Toyota products with 87 being OK but the tuning is different. You really want the vehicle to run as efficiently as possible and not be pulling timing.
#427
Are there any tuners with off-the-shelf tunes for the Toyota 1-UR?
I would love an 87 octane tune, haha. Even at $300 I would probably break even in 1 year with how much I drive
I would love an 87 octane tune, haha. Even at $300 I would probably break even in 1 year with how much I drive
#429
The Prado 150 has the same chassis and body for the most part but completely different engine options than the V8 in ROW markets. Diesels, 4 and 6 cylinders only.
Engine tuning/management also must clearly play a major role with this motor, looking up Wikipedia there are wildly different performance numbers depending on application:
Applications:
Engine tuning/management also must clearly play a major role with this motor, looking up Wikipedia there are wildly different performance numbers depending on application:
1UR-FE[edit]
The 1UR-FE is based on the 1UR-FSE but lacks the D4-S direct injection technology. Originally used for Lexus vehicles in the Middle East, it was introduced in 2010 in other markets to replace the 2UZ-FE engine in truck and SUV applications. This engine produces 347 hp (259 kW; 352 PS) at 6,400 rpm and 46.9 kg⋅m (460 N⋅m; 339 lb⋅ft) at 4,100 rpm in the Lexus GS and LS. For the Toyota Land Cruiser and Lexus GX the engine produces 304 hp (227 kW; 308 PS) at 5,500 rpm and 44.8 kg⋅m (439 N⋅m; 324 lb⋅ft) at 3,400 rpm.Applications:
- 2006–2017 Lexus LS 460 & LS 460 L (Middle East)
- 2005–2011 Lexus GS 460 (Middle East)
- 2009–present Lexus GX 460
- 2012–2021 Toyota Land Cruiser (Japan, China, Middle East and Australia)
- 2009–2012 Toyota Sequoia
- 2009–2019 Toyota Tundra
#430
Driver School Candidate
What octane gas are using in GX???
I filled up my wife's 2015 GX for the first time yesterday when I realized that is suppose to have octane 91 used. We have had it for 2 months and 87 has been ran at least 2 tanks. I am wondering what if anything it might have hurt. Sense I bought it used, I don't know for sure if previous owners used 91 or 87. Thoughts and or comments?
#432
Intermediate
Use 91 as stated in the manual. Running 87 a tank or two won't hurt anything but some say it can cause damage in the long run. Not sure how can anyone offset the few bucks of saving by using regular at a vehicle like the GX.
Fortunately, there's a wide selection of gas saving devices available, not specific to the GX:
Fortunately, there's a wide selection of gas saving devices available, not specific to the GX:
#433
Pole Position
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GXLUX (11-08-21)
#435