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Royal Purple is high in Zddp and is a good product ... Even Penn State . or Brad Pen or whatever it is called is a semi synthetic .. that is what I run ... on my 78 . no complaintes ..i don't thinkthere is any real benefit to synthetic since these engines and bearing clearances were designed arounf dyno oil ... but if you have all that money with nothing to do with .,, go ahead ,,
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1976 Yamaha XS360 ( Beats Walkin')
1978 911 SC Targa ( Yamaha Support Vehicle )
2006 Audi A4 2.0T (Porsche Support Vehicle )
2014 Audi A4 2.0T Technik (Audi Support Vehicle)
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