4Cruizn, A few of us around here use shell rotella oil, I did use valvoline racing vr1 10w30, but switched to shell rotella, I called shell lubricants and they told me it has a high zinc content I think it was 1300 ppm, and also called valvoline racing and they told me that valvoline vr1 has 1600 ppm zinc, rotella seems to work good with high performance engines I've use it in, alot of the round track racers here use it now and its cost is less than vr1 oil.