Phillips 66 X/C 20W-50 Aviation Oil delivers trusted, all-weather protection for general aviation, helping extend engine life and maintain performance in every flight.
Phillips 66 X/C 20W-50 Aviation Oil is a premium, multigrade ashless dispersant engine oil specially formulated for use in certified aircraft piston engines. As the industry’s first multigrade aviation oil, X/C 20W-50 combines the benefits of a high-quality mineral base stock with a superior additive package to deliver exceptional wear protection, cleaner engine operation, and reliable performance across a wide range of operating temperatures.
This versatile oil reduces cold-start wear while maintaining viscosity and film strength under high-heat, high-stress flying conditions. It meets the requirements of major engine manufacturers and is ideal for year-round use in both older and modern piston-powered aircraft.
Key Features:
✅ Multigrade SAE 20W-50 formulation for all-season protection
✅ Ashless dispersant formula keeps engines clean and sludge-free
✅ Reduces engine wear, especially during cold starts
✅ Resists oxidation and thermal breakdown at high temperatures
✅ Compatible with Lycoming and Continental engines
✅ FAA-approved and meets SAE J1899 / MIL-L-22851 standards
Ideal for:
Opposed piston aircraft engines (Lycoming, Continental, etc.): it can replace more rigid single‑grade oils (Commercial Grade 65/80/100) with no loss in performance
Engine break‑in: Provides cleaner, faster break‑in and sustained protection until time‑between‑overhaul
Phillips 66 X/C 20W-50 Aviation Oil delivers trusted, all-weather protection for general aviation, helping extend engine life and maintain performance in every flight.
Phillips 66 X/C 20W-50 Aviation Oil is a premium, multigrade ashless dispersant engine oil specially formulated for use in certified aircraft piston engines. As the industry’s first multigrade aviation oil, X/C 20W-50 combines the benefits of a high-quality mineral base stock with a superior additive package to deliver exceptional wear protection, cleaner engine operation, and reliable performance across a wide range of operating temperatures.
This versatile oil reduces cold-start wear while maintaining viscosity and film strength under high-heat, high-stress flying conditions. It meets the requirements of major engine manufacturers and is ideal for year-round use in both older and modern piston-powered aircraft.
Key Features:
✅ Multigrade SAE 20W-50 formulation for all-season protection
✅ Ashless dispersant formula keeps engines clean and sludge-free
✅ Reduces engine wear, especially during cold starts
✅ Resists oxidation and thermal breakdown at high temperatures
✅ Compatible with Lycoming and Continental engines
✅ FAA-approved and meets SAE J1899 / MIL-L-22851 standards
Ideal for:
Opposed piston aircraft engines (Lycoming, Continental, etc.): it can replace more rigid single‑grade oils (Commercial Grade 65/80/100) with no loss in performance
Engine break‑in: Provides cleaner, faster break‑in and sustained protection until time‑between‑overhaul
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