Phillips 66 Type M Aviation Oil 20w-50 is an ashless, nondispersant, multigrade engine oil recommended for use in aircraft piston engines where the operator prefers a mineral oil-based engine oil that does not contain dispersant additives. Phillips 66 Type M Aviation Oil 20w-50 provides easier starting and quicker oil circulation at low temperatures compared with single-grade mineral oils, while maintaining high film strength at high temperatures and under high loads for protection against wear and piston scuffing. Phillips 66 Type M Aviation Oil 20w-50 is available in one viscosity grade: SAE 20W-50. Phillips 66 Type M Aviation Oil 20w-50 typically is used as break-in oil for newly overhauled engines where all-mineral type oils are recommended. The multigrade formulation helps reduce cylinder glazing tendency during break-in. Break-in normally is accomplished in less than 25 hours of engine operation.
