Got it. I used Red Line SI-1 a couple times since it was highly recommended.Probably the same as anything else you buy - I just order it with the kit b/c it's simple. At one point I bought it by the case at Costco - Chevron Tectron. I do it each oil change, it's a why not to keep things sorted.
I'm sure it was from me and I don't think it quiets the clatter noise I know it does. A couple of guys in the forum bought it and agreed.I think I read on here before about Cerma maybe from you? lol. Do you really think it quiets down your engine and the other things they claim?