AeroShell Piston Oil is the official line of aviation piston engine lubricants, engineered for general aviation and light-sport aircraft. Formulated with straight mineral oils for engine break-in and ashless dispersant (AD) technology for regular operation, it provides superior camshaft wear protection, prevents sludge in the combustion chamber, and maintains viscosity stability under extreme flight temperature shifts. It strictly complies with aviation military specifications (MIL-SPEC) and OEM approvals from Lycoming and Continental.