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I've used the CEN-PE-CO 20-50 also, no problems, just seemed to milk a little quicker, but cleared up as soon as the engine got some heat in it, no brg issues or anything, typically use Castrol GTX, 20-50, and no problems with it either. Rather not comment on Valvoline, altho some are going to it, since they started adding the zinc or whatever back in. Bob
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"Being old, isn't half as much fun, as getting there"! Ole Robert I!  |