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Originally Posted by bmussatti
I hear good stuff about Royal Purple. A well know Porsche indy shop here in the Chicago area only uses RP oil and trans/gear lube for the air cooled Porsche engines. They do lots of race cars for the PCA too. A few guys here use it. CJ in Calli does.
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To my knowledge both Royal Purple and Red Line are class V synthetics. Not too many of those bad boys left.