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I want to say "Search is your friend"...but I won't. (Even though it is!)
I've been using the synthetic Castrol 10W40 for the last several oil changes, and have been good with it. Chose it over the 5W40 based on the recommendation of one of the forum members here, a guy who has a shop in PA that apparently does a fair amount of Porsche work. He's done used oil analysis on these and other oils and said he'd gotten more favorable readings from the 10W40 over the 5W40.
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Hybrid Mode
