What about zinc?

Because they're never called out about it when it starts. I gave an opinion early in this thread and one person who has consistently had an attitude towards everyone continues his rude responses and comments.
Yeah well. I say to each their own. If you wanna run the cheapest oil, go for it. If you wanna spend the bucks for Torco, have at it. "I" won't talk down to anyone for what they choose to run. It's all really personal preference anyway. I just know what's worked well for me and will continue to do it.