Got a link to the thread? And, was is specifically T6 in 5w40 or a different weight and different formula - T4, T5?

 

I seen a video from Lake Speed Jr. about low speed pre-ignition issues with this oil, all due to it having too much cleaning additives that bring on LSPI. The one good thing is that LSPI is not much of an issue for NA motors, mostly turbo DI engines. I did not see any claims about foaming but it might be true.

 

Sorry, i dont have a link. I read about the problems in the Bob is the oil guy forum. The test was done in the HPL labs. There where pictures posted in the Forum from the foam test.
The user "RDY4WAR" in the bob is the oil guy forum is the person to ask.
Beside this, there is this notable video:

 

That is where I saw it. I have watched a lot of that guys videos. Very interesting stuff.

 

So, I watched that video as well.

And, specific to note that it's the conventional oil T4 formulation and in 15w40 rather than the more popular T6 full synthetic in 5w40, which is mainly what gets used in gasoline vehicles (and among the motor cycle community as well).
The T6 - 5w40 was a big carry over from my days as a subi-STI owner. It also meets standards requirements for API CK-4 and API-SN for gasoline engines.




Also, the test motor example used for the destroyed piston is from an Audi-A6, that's standard for that motor, won't matter what oil you put in there.

 

I'm trying to find some legitimate testing info/videos on T6 foaming. Currently can only find hear say concerns that the high detergent content will cause foaming at high RPMs.

Except, I'm finding that T6 is JASO MA certified to be used in motorcycles, and finding a lot of different forum posts with motor cycle guys swearing by the stuff. Last I checked, a bunch of these sport bikes are revving to 12k-16k RPMs.

All of the blackstone lab UOA returns positive results too.

This is quickly turning into every "oil thread" out there. That said, still searching for more to find some real root cause documented failures tied to the T6 being used in a gasoline (non-direct injection) engine - also good to note that the failed Audi-A6 piston came out of a direct injection motor.

 

I am curious about the T6 5W-40 full synthetic oil as I also used it solely on my 05 STI and Forester back in 2005-2011. I also used it for 10 years on my 95 M3. I don't use it on my S2K but I would like learn as much as possible about it as I still use it on my 98 M3 that I have been restoring and only driving on occasion. I am not so hard headed as to believe that I really have any expertise on this oil or these possible side effects. But I also know that the tiniest whiff of negative news in the car enthusiast forums can spread like wildfire into the new "this oil is dangerous and will destroy your engine". I will watch some of these videos when I get a chance.

 

Ok, so, using the rating chart from the motor Oil Geek Chart below:




So, all of the Rotella T6 oils are JASO rated, picture below later. Only the 5w30 formulation of T6 has the API-SN rating; however, hear say is that the T6 5w40 used to have the SM rating, but they didn't want to pay the license for it. Again confirmed that it does have the JASO rating, which is important here, as JASO has cross over with a bare minimum "S" rated oil.

From here: https://360.lubrizol.com/2023/JASO-T...cation-Is-Here




And, on a 5quart bottle of T6 5w40 (JASO highlighted in yellow for convenience)