HDA

hi!

has anyone ever used oil additives during oil changes in the 964 or 993?
i have a couple of bottles of Schaefer Moly E. P. that are supposed to “do wonders” (see link http://www.schaefferoil.com/documents/37-132-td.pdf ).

do you add anything to your oil or good oil is enough?

cheers

fasterlaster

My thought on additives is there are a lot more well running engines on the road that never ran additional additives than those that did. It may not cause problems, and it may not 'do wonders'.

Rocket Rob

I run just straight oil, no additives. I got 237K out of my engine before I rebuilt it. The valve guides were worn but the bearings and rings were in good shape.

Is there a specific problem or concern you are trying to fix?

LexVan

Use a quality full synthetic oil. Change every 5,000 miles, or at least yearly (for low use cars). You don't need additives.

A914MAN

Since many oils do not have sufficient levels of zinc, a ZDDP additive isn't a bad idea if you have a lower zinc oil

HDA

Oil leaks !

Not really.
I just changed the oil with a Pennzoil 20W-50 (the cheapest) and I used the cheapest because... https://rennlist.com/forums/964-foru...l#post14616754

I think it's still a good oil. I just happened to have a bottle of this treatment that I used once on the NSX and I was wondering if I should throw it away or try it .

Rocket Rob

Have you read any of the threads on Bob the Oil Guy? They have discussions about Schaefer Moly EP

https://www.bobistheoilguy.com/forum...Number=1726384

911Jetta

I use good oil, but I like to add "vitamins" and change it often...

I've been using Brad Penn 20/50 for years, but a recent service garage change means I'm using Motul 15/50 V300 now.
I then add a can of Liqui Moly MoS2 Anti-Friction Engine Treatment after my engine burns through a 1/2 quart of oil: https://products.liqui-moly.us/addit...treatment.html
I do a complete oil change after 3,000 miles.
A couple tanks before I'm due to change the oil again, I add Liqui Moly Valve Cleaner OR Liqui Moly Jectron Fuel Injection Cleaner to the gas tank: https://products.liqui-moly.us/addit...ct-media-modal

HDA

I did read the post but it still did not make it clear if the product is or or not a try.

All I understood is that there are oil additives type of guys and just straight oil type of guys

Steve Weiner-Rennsport Systems

No oil additives for me.

I use a good oil that contains what I need since additives require different chemistries to balance the effects of such things.