http://www.amsoil.com/StoreFront/wct.aspx
Amsoil's 10w-30/40 Marine oils should be excellent for racing. I was looking at the specs and these oils are very robust. HT/HS for the 10w-30 is 3.64.
Amsoil's 10w-30/40 Marine oils should be excellent for racing. I was looking at the specs and these oils are very robust. HT/HS for the 10w-30 is 3.64.