Thanks John. I have been curious about Amsoil for quite a while and I went from Mobil 1 to RP. I used RP in my VX for a couple years until NAPA had a price jump for all oils. The price was ridiculous so I switched back to Mobil 1 again which I used during the first year of ownership. The Mobil 1 burns out much faster than the RP so I wouldn't recommend Mobil 1 to anyone but for the next change I may finally go for Amsoil!