Phillips 66 X/C 20W-50

Description

Phillips 66 X/C 20W-50 is a mineral-based aircraft engine oil formulated for air-cooled piston engines found in general-aviation aircraft. This straight-weight oil is designed to provide adequate lubrication and protection across the operating temperature range typical of Cessna, Piper, and Beechcraft engines, especially during climb and cruise phases where sustained heat demands reliable film strength.

Pilots and mechanics choose this oil when their engine’s maintenance manual specifies a 20W-50 grade, or when operating in moderate climates where thinner synthetics are not required or approved. Check your aircraft’s POH or engine manufacturer’s guidance before purchase, as some modern engines mandate ashless-dispersant (AD) or straight mineral oils with specific additive packages. Verify compatibility with your engine type and current fill before switching oils.