I went through this whole thing on this 2025 Toyota Rav4 I own right here on Bitog. Toyota technically wants you to run 0W-16 to satisfy our government's fuel milage thing. Toyota says however, you can use up to a 5W-30 here in the United States and that is what Toyota recommends people use in the same exact engine in other countries. It is in the wording. They use the word "recommend" in their owner's manual when it comes to engine oil viscosity. They don't use the word "required". According to the Toyota Corp. District Service Manager in this part of the USA there is no reference in the actual warranty coverage paperwork as to what engine oil viscosity to use. That guy, and my local service manager said they have no issue with me using a 5W-30, but they wouldn't or didn't write that on paper for me. I doubt if we see billboards out on the interstate highway anytime soon saying it is ok to run 5W-30 in your new Toyota gas burner engines. I currently am running a 5W-30. My next change will be to a 0W-30. I took some trips to Omaha, about a 300-mile round trip, and there was no difference or change in the fuel milage between the 0W-16 and 5W-30 that was big enough for me to see. The 5W-30 does make the engine a little quieter and seem smoother somehow. The "quieter" is real, the "smoother" could be imaginary, I guess. And by the way, I will not be moving up to a SAE 40 either. I am driving a Toyota family car, not a Porsche racer!
2025 Toyota Rav4 personal engine oil struggle.
- Thread starter GI_GRIFF
- Start date
I do think stickers and shirts (merch) would be really cool.
I'm in Chicago for the weekend with the 2024 Rav4 Prime XSE, and I'm glad I did an oil change to Mobil 1 ESP 0w-30 with the Porsche c30 cert from Amsoil 0w-16 SS. I feel confident keeping up with traffic and 90mph in the left lane is slow. Locals will drive 110 in the middle and even exit lanes.
I'm an engineer, that worked for an OEM automaker for 21 years, and there was nothing in that other thread that even remotely, logically, supported using the 40 weight straight weight oil you suggested. So yes, I was not convinced.
Then why does the 2019+ MK7 GTI/GLI share the oil pump with ea888-3B (which is a variable displacement oil pump, also controlled by the ECU)? 06H115105FS
Where the early MK7's GTI use 06H115105GC (just your typical positive displacement pump)
I think this shows how well you read the thread. I never suggested it. But I liked the suggestion another user made. His rationale is compelling. But let's not rehash that here. It was beat to death there.
I have no idea what you’re talking about or what point you’re trying to make. None of that is relevant to the discussion here.
Like I said, you’re falling for an Internet charlatan who has no idea what he’s talking about.
All I can say is you really do not understand how viscosity works in regards to temperature. A straight 40 grade oil is perfectly fine given the proper starting temperature. It can be the same as a multigrade.
There’s no technical reason why monograde oils are inferior if you know what temperature you’re starting at. In fact, they can be superior. They will not shear and can leave fewer deposits.
The new pump design was to allow use of the 508/0W-20. This pump doesn't prevent use of 30 or 40 grades (or whatever) which seems to confuse some folks - you can go thicker without issue.
In this case I would probably run Valvoline Restore and Protect 0W-16 and no oil additives.
At the time this cold start rattle was going on with my 2015 Honda, Valvoline Restore and Protect didn't exist at that time. I am just glad the Liqui Moly MoS2 stopped the noise, saved me some bucks at the time.
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