.......I was in O`Reilly`s one day on my lunch break just to kill some time. I got to talking to the two guys working there about oil. One guy points to the other and said "He`s an M1 guy and I`m an RP guy". The guy who says he uses RP (drives a V8 T/A) said he gets BAD lifter tick for a few minutes every time he starts his car,but it eventually goes away. Made me think about my experience (and several other`s) with RP.