[10/10ths]

…..I urge everyone to watch the PCA Tech Tactics episode on bore scoring and the one on oil and the one on fuel additives.

Also watch Lake Speed “The Oil Geek” you tube channel.

Yes, you want Moly and ZDDP in your Porsche engine oil.

But use an oil with that formula, do NOT add in stuff to add those components to an oil that does not have them.

Run Driven DI40 for the best engineered solution for M9X engines.

Other oils that are good are Driven DT40, Driven GP-1, and the newish Penzzoil Untra Platinum.

FWIW, the 986 Boxsters do not suffer from bore scoring due to their non-forged pistons.

If you watch the PCA Tech Tactics episode, they list which engines suffer from bore scoring.

On the Caymans, it’s the “S” engines that suffer.


Just use the right oil, don’t over think it.

I have a 2004 Boxster S and have 90,000 miles on her running Driven GP-1.

Good luck.