Aeroshell Oil W 15 W 50 is a premium semi-synthetic multi grade ash less dispersant oil specifically developed for aviation piston engines. AeroShell Oil W 15 W 50 is a special blend of a high quality mineral oil and synthetic hydrocarbons with an advanced additive package that has been specifically formulated for applications. The combination of non-metallic anti-wear additives and selected high viscosity index mineral and synthetic base oils, give exceptional stability, dispersancy and anti-foaming performance. The advanced additive package in AeroShell W 15 W 50 provides excellent protection to engines operating at extreme ambient temperatures. The ash less anti-wear additive package provides exceptional wear protection for camshafts and lifters and other wearing surfaces. AeroShell W 15 W 50 has become very popular amongst engine manufacturers and operators alike. In order to cater for those Lycoming engines that need improved load carrying, the Lycoming LW 16702 anti-wear additive has been incorporated into the formulation thus eliminating the need for supplemental additive addition.