Quote:
Originally Posted by Bill Verburg
latest is the ZDDP controversy. For long emissions systems life ZDDP levels have been reduced and for better economy lighter wt oils are used. ZDDP is an anti wear agent indicated for use where there are high loads, as in flat tappet cams.
Owners of older cars should avoid oil w/ the starburst seal on it as this is the sign of low ZDDP, low vis. oil
If you can get it there are several good 20w-50 or 15w-50 oils w/o the starburst seal that are available, my favorites are M! 15w-50 and Brad Penn 20w-50
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I drank the Kool-aid...and already have Bradd Penn in the car. Considering how much of a boutique-oil (if that's possible) BP is, I simply want to ensure it is the right choice. The fact that the recent 911 raffle car was filled with a Castrol product is curious.
Normally, I would look to the manufacturer for this information -not an independent. The obvious challenge to this logic is that an auto maufacturer's test parameters could have changed since my car was produced. And, they really don't have the funding to test all the various oils out there.
Has anyone sought out an official clarification from Porsche -or better yet Porsche Classic?