Premium Fuel Required (1 Viewer)

So I was watching a YouTuber video and screen shot this:

I wonder which is it? Driver manual says recommended and this says required. I plan to run premium fuel nevertheless.

 

[supersix]

Interesting. According to the manual, the new Tundra with the same engine recommends using 87 octane fuel.

 

[Flipside909]

So I was watching a YouTuber video and screen shot this:
View attachment 230

I wonder which is it? Driver manual says recommended and this says required. I plan to run premium fuel nevertheless.

Twin Turbo V6, computer is tuned to use 91 Octane (Premium) Mininum. This isn’t a Tundra, don’t worry about their requirements for fuel.

 

[supersix]

I'm all for running premium fuel for extra performance if the vehicle is tuned for it.

It's odd the Tundra which is tuned to run 87 octane would have more horsepower:

2024 Tundra - 3.5L Twin-Turbo V6 Produces 389 hp, 479 lb-ft
2024 GX550 - 3.5L Twin-Turbo V6 Produces 349 hp, 479 lb-ft

 

[MLMartin]

I wonder if they changed the programming of the ECU and figured they would sell more Tundra's with the 87 gas vs requiring 91 and losing sales.

 

[Lord Helmet]

I'm all for running premium fuel for extra performance if the vehicle is tuned for it.

It's odd the Tundra which is tuned to run 87 octane would have more horsepower:

2024 Tundra - 3.5L Twin-Turbo V6 Produces 389 hp, 479 lb-ft
2024 GX550 - 3.5L Twin-Turbo V6 Produces 349 hp, 479 lb-ft

I heard all types of rumors: different trim on the turbos, tuned for longevity, not taking sales of LX600, etc... I figure we will know once the head engineer explains it one of these days.

 

[Critmonkey]

ehh just put the highest octane in your area if you can afford it. In California we mostly cap at 91. If you're in other regions just look for 93 and above. Just dont put 110 in it lol.

 

[Guest1534]

I'm all for running premium fuel for extra performance if the vehicle is tuned for it.

It's odd the Tundra which is tuned to run 87 octane would have more horsepower:

2024 Tundra - 3.5L Twin-Turbo V6 Produces 389 hp, 479 lb-ft
2024 GX550 - 3.5L Twin-Turbo V6 Produces 349 hp, 479 lb-ft

The 2024 GX550 engine is a 3.4L engine.

 

[F90Guy]

I'm all for running premium fuel for extra performance if the vehicle is tuned for it.

It's odd the Tundra which is tuned to run 87 octane would have more horsepower:

2024 Tundra - 3.5L Twin-Turbo V6 Produces 389 hp, 479 lb-ft
2024 GX550 - 3.5L Twin-Turbo V6 Produces 349 hp, 479 lb-ft

The tundra comes with bigger turbos, so tuned for a bit more boost hence a bit more power. I thought that the LX600 also has the same engine as the Tundra with bigger turbos, but car care nut said its the same as the GX. Which I think he is mistaken, both LX and Tundra have bigger turbos then the GX.

Of course the LX will have to make more power being a flagship vehicle. Just like back in the day LX470 made more power than GX470, they had identical engines.

 

[F90Guy]

The 2024 GX550 engine is a 3.4L engine.

They're all 3.4L TT, 3.5 seems to be a common "marketing" typo. All these vehicles have V35A which is 3445 cc. In hybrid version it makes 409hp

 

[GX550Key]

The Car Care Nut, watch 17:06 Obvious but Important to Know

 

[SteelWorker]

The Car Care Nut, watch 17:06 Obvious but Important to Know

Nice find.

@17:18 "If your turbo car takes premium fuel your sure way of destroying that engine is putting non-premium fuel..."

@4:31 he also discusses warming up and cooling down a turbo.

I watched this a few times, he backs up his recommendations with solid reasons.

 

[SteelWorker]

In reply to my own post, I checked a 2025 MY owner's manual and I found a similar recommendation/instruction for idling then engine before shutdown.

Page 174 has this:

Car Care Nut takes this further and says idle for one to two minutes for all driving conditions.

 

[JKM]

higher octane in a turbo charged engine will help prevent pre detonation in the cylinder. If it was N/A i would say doesn't make a difference. Not sure how much boost this engine is running but compression is 10.5:1 which isn't horrible considering the engine really isn't pushing that much power. When i built my M5 motor with forged internals i lowered compression a full point but also had custom turbos and was running 24psi on pump then 31 psi on MS109 with port injected straight M1 Methanol. Made 1,026 WHP. That was a fun daily driver for a few years lol.

 

[JKM]

In reply to my own post, I checked a 2025 MY owner's manual and I found a similar recommendation/instruction for idling then engine before shutdown.

Page 174 has this:
View attachment 13465
Car Care Nut takes this further and says idle for one to two minutes for all driving conditions.

They say that just to cool down turbos after running it hard. Also, if they wanted to be dicks they could try to claim this to wiggle out of a warranty claim.