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    Penrite HPR5 v Penrite Premium 0 for Porsche Australia

    Hi gurus Apologies if it’s a repeat - tried searching. 2006 Porsche Cayman S. Rebuilt as 3.8 with Nickasil cylinders. The owners manual calls for: 0W-40, 5W-40, or 5W-50 (flawed “Lokasil” bores stock) About 8 litres a change. Then uses a little over the life of the oil - flat 6…. The...
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