2025 Toyota 2.5L Engine Oil Viscosity Update.

[OVERKILL]

Probably 10k oil changes…

Yes, if only Toyota could figure out how to make an iOLM like every other car maker on the planet

 

[NattyBoh]

I thought we were on the same page as to these engines NOT having electronic oil pumps? My wife has the A25A-FXS, not the FKS as stated in the video.

Does her motor have the supposedly electronic fuel pump?

 

[GI_GRIFF]

.https://youtube.com/@i_do_cars?si=XmoAYiXabo8l7GWq

"Mechanic's Special".
2018 Camry.
Rare engine failure.
A25A-FKS.
(Same engine as RAV4).

"I Do Cars" on YouTube.
A++

Here is another kid showing a seized A25A-FKS, towards the end he says that he suspects it was caused by the failed electric water pump.

 

[hemitom]

Here is another kid showing a seized A25A-FKS, towards the end he says that he suspects it was caused by the failed electric water pump.

Somehow the Fram filter will be blamed for it LOL.
And that is one clean engine for 125k

 

[dubber09]

My son in law has Tacoma 2021 V6 and I'm switching it to ESP 0w-30, daughter has Rav4 2025 and it's getting ESP 0w-20 ever since factory oil is out. 5k miles OCIs with both.

 

[DirectRejection]

I thought we were on the same page as to these engines NOT having electronic oil pumps? My wife has the A25A-FXS, not the FKS as stated in the video.

Does her motor have the supposedly electronic fuel pump?

No worries. Failure is unlikely.
Electronically controlled components. So it is probably sensors that fail, QC ?

The Crown reverted to a purely mechanical thermostat, with failure less likely

 

[GI_GRIFF]

I have been going crazy trying to make a good choice of a 0w-16 oil for my new Toyota without using that world's greatest pyramid scheme $15.00 a quart oil. I called my local Toyota Dealer today 6/6/2025 where I purchased my SUV and got Jason, the service manager. I asked him directly if I could switch to a 0w-20 engine oil without Toyota corporate rejecting my warranty. He looked it up and said according to Toyota corporate I can permanently use 0w-20 or 5w-20 engine oil in my 2025 Rav4 SUV with no risk of causing warranty issues. I know it is not that big a difference really, but it makes me feel better, plus it opens up more choices. I thought maybe some people would like to know this.

I know this is against the rules here, but at least for a while, I decided to go with Liqui Moly Molygen 5w-20 oil. https://www.liqui-moly.com/en/us/molygen-new-generation-sae-5w-20-p003693.html#22152

 

[JohnnyJohnson]

Yeah, but who wants to spend all day in a Walmart!

You can order online and they will deliver free on a $35 order.

 

[GI_GRIFF]

You can order online and they will deliver free on a $35 order.

I don't know if you are interested @JohnnyJohnson , but I started this thread. I actually didn't go with the Liqui Moly Molygen, I ended up using Mobil 1 ESP 0w30 and a 300mL can of product 2009 Liqui Moly MoS2 mixed in. The Mobil had a HTHS >3.5 and the Mos2 has really helped me in the past, doesn't cost much and won't hurt anything. Take Care

 

[anndel01]

The OM for our 2022 Rav4 Hybrid XLA with the A25A-FXS engine states that 0W-16 is the recommended viscosity. If not available, 0W-20 can be used but MUST go back to 0W-16 at the next oil change. This is for Hawaii. I use Mobil 1 Advanced Fuel Economy 0W-16 since it's available and cheap at WM. Trying M1 Hybrid 0W-20 right now but going back to 0W-16.

 

[ATex7239]

The OM for our 2022 Rav4 Hybrid XLA with the A25A-FXS engine states that 0W-16 is the recommended viscosity. If not available, 0W-20 can be used but MUST go back to 0W-16 at the next oil change. This is for Hawaii. I use Mobil 1 Advanced Fuel Economy 0W-16 since it's available and cheap at WM. Trying M1 Hybrid 0W-20 right now but going back to 0W-16.

That statement is for CAFE reasons. Not functionality or reliability reasons. Either 16 or 20 is perfectly acceptable.

 

[Wireman1987]

CAFE is over with it’s just the norm.

 

[kschachn]

That statement is for CAFE reasons. Not functionality or reliability reasons. Either 16 or 20 is perfectly acceptable.

Those EPA required “dire warnings” are apparently doing their job. As they were intended to do.

 

[jjensen]

Even if it specs 0w-8 you can still use 30 grade in them

View attachment 283557

Watch for new insights coming on this, Saturday 1/3 from Lake Speed Jr

 

[SugarMouth]

Watch for new insights coming on this, Saturday 1/3 from Lake Speed Jr

The latest video had an interesting difference in sheer with xW-16 vs xW-20.

 

[altaylar]

The latest video had an interesting difference in sheer with xW-16 vs xW-20.

View attachment 318317

This image kind of makes the viewer thing that a typical xw16 oil has inferior VM or starts lower on the grade viscosity limita. Unfortunately data science requires more explanation. I wonder how this table would look for those 0w16 and 0w20 if hybrids and heavy diluters excluded, and shows viscosity loss rather than a binary "in / out of the grade"

 

[SugarMouth]

This image kind of makes the viewer thing that a typical xw16 oil has inferior VM or starts lower on the grade viscosity limita. Unfortunately data science requires more explanation. I wonder how this table would look for those 0w16 and 0w20 if hybrids and heavy diluters excluded, and shows viscosity loss rather than a binary "in / out of the grade"

I would love to see a debate between OVERKILL and Lake Speed Jr. That would be worth paying for.

 

[altaylar]

I would love to see a debate between OVERKILL and Lake Speed Jr. That would be worth paying for.

I don`t actually know what is OVERKILL`s profession, but juding by the depth of his knowledge, I presume he has a technical line work.

Usually a debate between a scientist/academic/engineer and a sales/marketing/politican person does not create a good set up, as one relies more on confidence/window dressing whereas the other slows himself trying to be factual and mathematical

 

[kschachn]

The latest video had an interesting difference in sheer with xW-16 vs xW-20.

View attachment 318317

Without knowing what oil this is useless. A joke really.

 

[GenSan]

Recent UOA on Castrol EDGE Extended Performance 0w-20. The only oils that held up their flashpoints to fuel diltuion were Mobil 1 ESP 0w-30/0w-20 and the other was Pennzoil Platinum 0w-16.