This must be one of the hardest topics to discuss, but the info provided on LN's website is very informative. I've ordered 10 Quarts of Swepco 5w-30 due to it's ZDDP and Moly levels for my next oil change. However seeing the link to the PDF file "Oils ain't Oil" I'm really thinking of switching to Royal Purple instead. Thanks to the LN, Flat Six guys for sharing their expertice on a very complicated topic for us layman!
I'll probably still use the Swepco as for now though.
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