tolian21

Why not use 5w-30 PUP?

ESh

In which engine?

tolian21

es300h from OP

ESh

That would be a no no.

tolian21

why? Do you have any proof besides quoting owner manual ?

ESh

1. Owners manual (what's wrong with that?);
2. Car Care Nut;

tolian21

None of the above are convincing, especially when the same engines sold in other countries allow for thicker viscosity in their manuals

mikemu30

Different climates perhaps? But I don't speak Spanish. Is this saying that thinker oils are okay for the hybrid?

Wilson2000

Interesting Tolian! Have you seen this, or just heard that manuals in foreign markets call for 5W-30? Even if it's true, does it make sense to use thicker oil just because you can? If 0W-16 provides adequate protection along with slightly better gas mileage, why not use it? A few reasons I could conceive of...Perhaps thinner oil is more likely to get past low-tension rings, resulting in combustion chamber carbon build-up and greater oil consumption. Or, maybe thinner oil won't provide adequate protection, especially if oil dilution occurs, which is not uncommon in direct injection engines.

Thanks to all contributors on this thread. While there may be more questions than conclusions, a lot of great points have been raised!

While waiting for further research, data, and evolution in best practices for modern engine maintenance, I'll be performing 5K mile OCI's with 0W-20 "Valvoline Restore and Protect" and "Purolator Boss" filters (and no, I'm not a rep for either company, and I'm not an "influencer").

tolian21

yes, it allows a range of viscosities, including 0w-16. Not sure climate is so much different from Texas or Florida. It has to do with CAFE regulations in US to improve MPGs.

Wilson2000

Tolian: You beat me to the punch...As you were posting this, I was composing my post asking if you had actually seen this in a foreign owner's manual.

Thanks a lot for sharing this. It's definitely food-for-thought, and it eases my mind about using 0W-20 Valvoline Restore and Protect!

ESh

These engines have so tight tolerances that they can run on 0W8 oil. You should know that the difference in thickness between 0W8 and 0W16 and 0W20 is very small. Some people think that 0W16 is two times thicker than 0W8 which is not true
It is important to know that any engine that has no oil pressure problems is adequately lubricated and there will not be any kind of wear.
It seems like you are not aware how ICE engines work. Also, you don't know what the oil does inside the engine. No problem with that. The problem is when you want to teach the others about something that you have no knowledge about.
Personally, I work on cars, I have tear down a lot of engines and I know one or two about them.

When 0W20 came out and Toyota was recommending it for 2GR-FE engine, people went crazy. After almost 20 years these engine run perfectly fine with 0 wear.

tolian21

I’ve seen it with several cars, including my Acura 2020 RDX that allows 5w-30/0w-30/0w-20 in Mexico but only 0w-20 in US.
Sometimes other countries do not have the same engine as its only sold in US and Canada. The manual I posted may not be for your exact engine, just that might require a bit more research.

I am sure 0w-16 is also fine. The difference between 0w-20 and 0w-16 is so small, the motor will not know the difference.

tolian21

Did I say that 0w-16 is bad? Where is the explanation that other countries allow more than one viscosity?

Toyota must be making different engine tolerances for Mexican market and ECM programming, is this going to be the explanation?

2GR-FE before 2013 was marked to use 5w-30
, in 2013 it became 0w-20, did they make tolerances smaller in the same engine?

Wilson2000

ESh: No need to cast aspersions...we can work toward consensus without getting personal. Let's try to avoid the "dumpster fire" UltraLux22 predicted!