Well, isn't RP fairly high in zinc? Probably not the best choice for 'cold weather starting' or fuel-efficiency in the cold vs. another synthetic oil, but I don't see how it would hurt in the OP's app. I like their oil in general. If zine is really a concern, you know RP has zinc so, if no Rotella or HDEO...there you go.
Is Royal Purple a good SYN?
- Thread starter ckmarsh
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