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-   -   High "moly" content oils for modern p-car engines not ZDDP (http://forums.pelicanparts.com/off-topic-discussions/1164695-high-moly-content-oils-modern-p-car-engines-not-zddp.html)

masraum 07-22-2024 11:55 AM

High "moly" content oils for modern p-car engines not ZDDP
 
This came out of the PCA video on bore scoring. I know we're all familiar with the whole "oil should have ZDDP" thing. Apparently, in many/most of the modern Porsche motors, ZDDP is not particularly helpful/useful because the bores and pistons aren't ferrous. (I'm not sure if that applies to the wear pads on the piston skirts) According to the video, what boxsters, caymans, cayennes, macans, etc... need are high "moly" content oils.

<iframe width="560" height="315" src="https://www.youtube.com/embed/U_K_XkXx1Tw?si=zY7yTwd3GD5NtIdS&amp;start=903" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

It's been a bit since I watched the videos, but I remember 2 names coming up, Liquimoly (specifically the ceratec oil treatment), and Driven (DT40 & DI40). I remember the statement being made that not all liquimoly oils have high moly content.
It's interesting that the DI40 is specifically for vehicles with Direct Injection.
Liquimoly ceratec - https://www.liqui-moly.com/en/us/cera-tec-p000017.html
Driven DT oils - https://drivenracingoil.com/c-1389359-shop-by-product-street-performance-oils.html
Driven DI oils - https://drivenracingoil.com/c-1389348-shop-by-product-direct-injection-oils.html

Anyone using any of these?

afterburn 549 07-22-2024 06:41 PM

After a long study on P scoring the net results from many various sources is to move over to a good 5W30.
It will prolong the misery.
The ZDDP is a good package for flat lifter cars, but does not do much for the skirts banging on the lower cylinder walls.

masraum 07-23-2024 03:55 PM

The videos (there are 4, linked below) were really interesting.

If the folks in the video say that moly heavy oils help, I'm game. They also said that you should not let a cold car sit and idle (mostly targeted at sub-freezing environments), and you should also drive a car and get it up to temp before hammering it, and explained why those things were important. The various scientific tidbits in the video about the specifics of the pistons, cylinders, and materials were really interesting and informative.

Apparently, ZDDP will "bond" with ferrous surfaces but not Al. But moly will form a protective coating on Al. They also recommend going with shorter oil change intervals than the factory recommends.

I probably need to get an oil analysis done. I wish I'd seen the videos years ago.

What I also found very interesting was that these issues impact pretty much all of the modern Porsche engines including the Macan and Cayenne are impacted. Motors with forged pistons are especially impacted (S model coxsters more than base models).

afterburn 549 07-23-2024 04:55 PM

Also, if not stated, the correct oil is essential with direct injection application to avoid low-speed knock.
The trouble is several different markings prove if usable in the situation.
Amsoil uses AI as the abbreviation.
There are several more for other brands.
Supposedly the GM test is a very high standard.
IDK if true or not.


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