has anyone run thicker oil like Delvac 1300 or supertech 15w40? Or even 5w40?
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yeah, seen that, thanks.![]()
Update: 5W-30 & Heavier Recommended RoTW
Update: confirmed that the 3UR is recommended to run a whole suite of heavier oils. Screenshots from UAE 200 5.7L manual below. More proof that environmental regulatory agencies have handcuffed Toyota in the states. I spent the better part of yesterday’s afternoon researching oil viscosities...forum.ih8mud.com
I run 5-30 in both our UR's ('16 LC and '11 Tundra) because of the other thread. Never have noticed a difference vs 5-20 but feels good to in theory have better protection.
15-40 seems like a huge jump. Random thought, does thicker viscosity stress the factory oil pump? Is there a diminishing return on increased oil pressure if factory oil passages are fixed in size?
yeah, seen that, thanks.
pretty diluted thread.
Just wondering if anyone has used 15w40. All things being equal, thicker viscosity = less wear.
Less wear typically = less heat, not necessarily less friction.
Heat is what kills timing chains.
I am under the opinion that 5w30 \ 10w30 would suffice for both cold and hot areas, mostly in the USA where temps are greatly different in the seasons, as we have 4 typically.
Because American 200 series owners are often bored, and want to overmaintain their 200 and overcomplicate their lives - since they are usually too rich and bored and having nothing substantial to worry about that are real problems in their life.I don't get why we're trying to re-engineer oils when the OEM has designed and validated with an abundance of data what works and works best.
Agreed.Because American 200 series owners are often bored, and want to overmaintain their 200 and overcomplicate their lives - since they are usually too rich and bored and having nothing substantial to worry about that are real problems in their life.
Where ROW 200 series owners are too busy going to work, fighting wars, surviving, and realizing that bare maintenance by the book will get their LC to last enough for a lifetime.
1st world western luxury - ... is an amazing thing to watch
I hear you and know you do not run 0W20 yourself as per the factory manual per other posts.Don't assume that 15w40 = less wear or even less heat. Blanket statements like that don't work in complex system.
It's been mentioned but cold startup wear is often more significant in modern engines, and where thicker oils generally are not going to be better.
Thicker oils also flow slower so even as it has marginally higher specific heat, it's not going to cycle and cool the overall engine better.
Flow can be just as important as lubricity.
I don't get why we're trying to re-engineer oils when the OEM has designed and validated with an abundance of data what works and works best.
Sure, small tweaks in viscosity for extreme use cases or extreme predominant regional temps.
IMO 15Ww40 is no where close to the best solution for this engine.
of course, and 15w40 is clearly in the manual, which is why I asked if anyone here used it.when the OEM has designed and validated with an abundance of data what works and works best
right, I do not run it either. 5w30 is the minimum I will go.I hear you and know you do not run 0W20 yourself as per the factory manual per other posts.
For clarity, was referring to TeCkis300of course, and 15w40 is clearly in the manual, which is why I asked if anyone here used it.
right, I do not run it either. 5w30 is the minimum I will go.
preach on!One of the main reasons I picked the LC200 was the 3ur really doesn’t care what you run.