5 People Who Need to Become AMSOIL Preferred Customers Daisy Quaker|2017 Feature So you love to rave about how AMSOIL synthetic lubricants boost your mpg, or how many miles you’ve gone with your 1992 Taurus, but if you’re not an AMSOIL Preferred Customer (P.C.) and you regularly buy AMSOIL products, you ain’t doing it right. […]