Motor Oil Info

Aftermarket oil additives are not necessary in fully-formulated oils. Fully-formulated, high-quality engine oils are blended with additives that are carefully balanced to be synergistic, performing well together. Tampering with the balance by adding other chemicals can adversely affect overall oil performance, sometimes dramatically.

Some aftermarket oil additives contain extreme pressure agents that can be harmful to engine components. Oxidation inhibitor, detergent and corrosion inhibitor performance is sacrificed when extreme pressure additives are added to fully formulated oil, leading to sludge formation and engine corrosion. AMSOIL Synthetic Motor Oils do not need any oil additives. The FTC has accused multiple aftermarket additives manufacturers with misleading consumers into believing their products can offer extra protection when added to motor oils. The list of companies includes Prolong, Slick50, Zmax, Duralube, Shell Castrol and Valvoline.