Why are AMSOIL Motor Oils capable of extended drain intervals?
It’s all in the formulation. AMSOIL uses top-quality synthetic basestocks along with top-quality additives in the manufacturing of their oils. This combination of basestocks and additives makes AMSOIL Synthetic Motor Oils highly resistant to the destructive effects of heat by not breaking down like petroleum oils. This means that AMSOIL Motor Oils can provide much longer drain intervals then conventional lubricants. Other oil companies do not use top-quality basestocks and additives because it doesn’t pay to use them in their short lived oils.