GR Yaris Balance of tuning and durability limits
- Thread starter Onehp
- Start date
I rather follow the recommendations of Nahokito Saito, the chief engineer of the GR Yaris, who specifically told me to use the 0w20 oil with correct ilsac gf 6 grade, even on extreme use, to avoid shortening the lifespan of the engine, than some tuners recommendation with vast less resources to find out what works or not, but each to their own.
Saito san will not be the one denying your warranty, it will be Toyota corporate warranty & risk and if they want to void it, they will regardless of what you say. Best to completely avoid the situation with 5w30 is GF6A and SP grades such as Total Quartz 9000 Future with adequate oil cooling, 3,000km changes. Stockpile parts for when the clutch goes as that is engine out anyway.
MilanGRY
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- Nov 29, 2023
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It would be ideal if someone could get access to the GR Yaris Rally2 manual to see what Oil TGR recommends.
Just because Toyota recommends 0w20 for the street car, doesn't mean it transfers to a car that does a lot of tracktime.
One example I have is the Renault Clio 4 RS uses 5w40 oil, but Renault Sport recommends 10w60 oil on the Clio Cup Race car, which also has a completely standard engine.
Just because Toyota recommends 0w20 for the street car, doesn't mean it transfers to a car that does a lot of tracktime.
One example I have is the Renault Clio 4 RS uses 5w40 oil, but Renault Sport recommends 10w60 oil on the Clio Cup Race car, which also has a completely standard engine.
Since Toyota also say their warranty covers track use with the recommended 0W20 i think their pretty confident that‘s the correct oil for track use.
I also used the 0W20 up to 400hp with the stock engine on the racetrack and the road for over two years and never had any issues.
So i don‘t see how that should be the problem.
Sam
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MilanGRY
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That doesn't mean much to me that Toyota covers the warranty for track use.Since Toyota also say their warranty covers track use with the recommended 0W20 i think their pretty confident that‘s the correct oil for track use.
I also used the 0W20 up to 400hp with the stock engine on the racetrack and the road for over two years and never had any issues.
So i don‘t see how that should be the problem.
Just look at the amount of engine failures and denied warranties on the GR86 due to oil starvation.
Add the fact that you need an oil cooler and the diff overheats is proof enough the GR Yaris is not a track ready car.
If you did over 10'000km of pure racekilometers then yeah 0W20 should be no problem, but if you did less then its too early to tell.
I also use 0W20 on my car, but it still would be interesting to see what TGR uses on the Rally2.
Toyota recommends 0W20 for the GR Supra, but the GT4 version uses 5W30. I know what oil I'd use if I'd track a Supra...
You have to look at it from a different angle.
Pure Racecars, aka GT4, get their oils preheated before they go out and race the car. Or at the very least, you let the car warm up in the safety of the pitboxes.
And most race seasons are in summer, so it‘s not very often below 0 degrees.
And if you start your car on a sunday morning in the middle of january in front of your hotel at St. Moritz because you‘re on holidays there with the GR, which is a very nice car to drive in the winter and snow, i‘m 100% certain the 0W20 will do a MUCH better job than your 5W30.
And that‘s why Toyota recommends that oil for the GR Yaris and most likely uses something different in their racecar.
So unless you use the GR like i do, as a pure racecar and only in the summer, i highly recommend the 0W20.
MilanGRY
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Yes of course thats correct, every standard driver who drives the car on the street should stick to 0W20 I'm not debating that.
I'm talking about extreme cases where its only used on the track.
I use my car only for the track and also not in Winter, the only time I drive it on the street is when I'm heading to a race track.
I'm talking about extreme cases where its only used on the track.
I use my car only for the track and also not in Winter, the only time I drive it on the street is when I'm heading to a race track.
In that case i wouldn‘t even go for a 5W30.
We use Motul 300V Competition 15W50.
Most likely one of the best oils to use for racetrack in summer only.
Holy Sh@t don't tell AJ Doomsport that!!!!! be making another video........In that case i wouldn‘t even go for a 5W30.
We use Motul 300V Competition 15W50.
Most likely one of the best oils to use for racetrack in summer only.
I'm not sure why this one hasn't been shared here, but as I said, there's no need to panic. Even at 300kw at the wheels, the factory piston won't fail if you keep the temps, fuel, tune and maintenance solid.
Write up: https://powertune.com.au/2024/05/03/g16e-engine-breakdown/
Write up: https://powertune.com.au/2024/05/03/g16e-engine-breakdown/
Sekred
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It is a bit of a red herring assumption based on the theory of "mega-blowby", which is more than likely a combination of LSPI and typical detonation symptoms. I think the issue is with the piston material and design itself not holding up to certain levels of detonation where others typically would. Hence the Gen2 and GRC have revised "reinforced" pistons.But but AJ said its Big ring gaps
Not saying AJ is deliberately being misleading, it is just hard to be objective when the majority of the evidence is destroyed during the event.
Michael Knight
Totally Hooked
another thread - not directly from TGR but independent rally2 team
GR Yaris - Dealer Service - Oil Query
Seems Toyota Oil is now available in API SP spec: TOYOTA PART NUMBER 08880-86294. Quick ebay check shows pics with the latest spec. Are people now seeing this when they have their cars serviced at their dealerships (what's on your invoice) ?
www.gr-zoo.com
Sekred
Totally Hooked
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Blowby enters the crankcase and then into the PVC system and into the engine either into the IM or the intake pipe before the turbocharger. Eventually it is burnt in the combustion chamber.
I am not saying AJ is being deliberately misleading either but he has no clue whats going regarding the piston failures and making/ posting a YouTube clip like he is some kind of expert just makes a person look foolish.
I am not saying AJ is being deliberately misleading either but he has no clue whats going regarding the piston failures and making/ posting a YouTube clip like he is some kind of expert just makes a person look foolish.
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He's even talking about negative blowby, which is extremely unlikely as there should be no high pressure in the crankcase. That said LSPI there are some theories about oil droplets from the piston ring area ending up in the combustion chamber, where cold engine walls and excess fuel washing the droplets out could be contributing.
Still enough cases of (tuned) GRC doing piston shattering so not a fail proof solution?
