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    BMW 20w-50 synthetic recommendation

    I live in houston so it ranges from 10-105 F. I don't have a problem with the oil itself but I have to order it, and I can only buy it in single quarts.
  2. F

    BMW 20w-50 synthetic recommendation

    So I have an e28 535i with a m30b34 the manual in my climate recommends 20w-50. I have been using royal purple hps but I would like to move to something better. The engine has solid faces on the rockers instead of rollers so I still need zddp in the oil but I'm fine with adding it. What oil, and...
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