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i am no expert, but...the rod bearing clearances for the S63Tu (.025-.070mm) are much bigger than the S65/S85 (.010-.034mm) and we're talking 0w40 or 5w40 in the S63Tu versus people dropping down to 5w50 in the S65/S85. If the latter combo has no issues getting oil between the bearings I don't see how the former would.
Probably more important than 5w30 vs 0w40 vs 5w40 is making sure whatever you choose has a low NOACK and high HTHS and frequent oil changes (esp. with the 30 weight).
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Sakhir Orange F10 M5 | KW V3s | Dinan Swaybars | Turner Monoballs | Soul Exhaust | Mishimoto Oil Cooler
Last edited by vafan13; 08-25-2022 at 12:54 PM..
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