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oil temps regularly at 250*F+. Almost every 2004-> Porsche owner that races is using M1 0W-40 and a few Amsoil. Never seen anyone use Royal Purple. Anyone that says they had an engine fail because of M1 0W-40 has other problems like an improper rebuild or using the wrong weight. Some of the older 911 guys run a 50 weight oil.
posted by 67.184.198...
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