Phillips 66 X/C Aviation Oil 20w-50 Engine Oil

Phillips 66 X/C Aviation Oil 20w-50 Engine Oil
Phillips 66 X/C Aviation

0.00 LBS

Phillips 66 X/C Aviation Engine Oil 20w-50 for Normal and Break-in Use

Experience the power of Phillips XC 20W50, the premium choice for your aircraft piston engines. Formulated with advanced technology, this ashless dispersant, multi-grade engine oil outperforms single-grade oils, ensuring optimal performance in all seasons for year-round use

Benefits of Phillips 66 X/C Aviation Engine Oil 20W-50: 

  • Engine Cleanliness: Minimize engine sludge, varnish, piston deposits, and combustion chamber deposits for a cleaner, more efficient engine. 
  • Cold Weather Performance: Experience easier starting and faster oil circulation, even at low temperatures, compared to single-grade oils. 
  • Reduced Warm-Up Time: Get your engine up to operating temperature faster, allowing for quicker readiness and improved performance. 
  • High Film Strength: Protect your engine against wear and piston scuffing, even under high-load conditions and elevated temperatures, such as during takeoff. 
  • Efficient Break-In: Enjoy a cleaner and quicker break-in period compared to traditional non-additized, single-grade oils. 
  • Rust and Corrosion Protection: Safeguard your engine against harmful rust and corrosion. 
  • Decreased Oil Consumption: Benefit from reduced oil consumption in most engines, ensuring longer-lasting oil and fewer top-ups. 
  • Year-Round Versatility: Suitable for use in all seasons, providing consistent performance in various weather conditions. 


Phillips 66 X/C Aviation Engine Oil 20W-50 is recommended for use in opposed piston engines. It can replace Commercial Grade 65, 80, or 100 single-grade engine oils without sacrificing performance.

Whether you're operating flight schools, charter and cargo airlines, acrobatic aircraft, spray planes, race planes, or any other general aviation application, Phillips 66 X/C Aviation Engine Oil 20W-50 is the trusted choice. With over 30 years of proven performance, it has become the preferred oil for aviation professionals worldwide. 

Experience the unmatched quality and reliability of Phillips 20W-50. Keep your engine running smoothly, maximize performance, and ensure the longevity of your aircraft. Order now to elevate your aviation experience.

Meets Requirements of:

  •  Avco Lycoming Material Specification No. 301G
  • Pratt & Whitney Service Bulletin No. 1183 Rev. U
  • SAE Standard J1899
  • Teledyne Continental Material Specification MHS-24B
  • U.S. Military Specification MIL-L-22851D (obsolete) for additive treatment
  • QPL Approval Number: D07L1-20W-50

Typical Properties

SAE Grade 20W-50
Gravity, °API 30.1
Specific Gravity @ 60°F 0.876
Density, lbs/gal @ 60°F 7.29
Color, ASTM D1500 2.5
Flash Point (COC), °C (°F) 235°C (455°F)
Pour Point, °C (°F) -33°C (-27°F)
cSt @ 40°C: Viscosity, Kinematic 159
cSt @ 100°C: Viscosity, Kinematic 19.8
Viscosity Index 144
Cold Cranking Viscosity, cP 5.200
@ (°C) (-15° C)
Acid Number, ASTM D664, mg KOH/g 0.15
Ash Content, SAE J1787, wt% Nil
Copper Corrosion, ASTM D130 Pass
Foam Test, ASTM D892 Pass






102 Reviews | Write a Review.

  • 5
    20w-50 aviation oil

    Posted by Andrew W Waidner on Apr 16 2024

    Very fast service at a good price.

  • 5
    flying season

    Posted by Calvin S. on Mar 12 2024

    first sign of nice weather, i know it's time to pick up the best from the best. always in stock with super fast shipping.

  • 5
    As advertised

    Posted by Oscar Gomez on Oct 11 2023

    Items arrived in perfect condition. Competitive price.

  • 5
    Phillips XC

    Posted by John Majane III on Oct 04 2023

    This is an excellent aviation oil. Two years ago after a cylinder change the shop put it in my engine. I had been using Aeroshell 15W50. I immediately noticed that the oil leaks from my E-225-8 were substantially reduced. No difference in performance, oil pressure or anything else and it is less costly.

  • 5

    Posted by Anonymous on Sep 21 2023

    Quickly shipped

  • 5
    Aviation oil

    Posted by John on Aug 22 2023

    Quick service and a great price. What’s not to like?

  • 4
    20W50 case of gallon jugs ordered

    Posted by Ken Johnson on Aug 15 2023

    Excellent service and rapid delivery. Price of delivery has increase since last order!

  • 5
    Exactly what I order

    Posted by Tom Nery on Jul 21 2023

    Exactly what I ordered and delivered ahead of predicted schedule.

  • 5
    Oil works great for us

    Posted by Ed Borstel on Jul 10 2023

    Switched from Aeroshell straight weight oils to Phillips multi blend when Aeroshell was experiencing supply demand issues. So far we are pleased with the product and the price. It seems to work fine and is a bit less expensive.

  • 5

    Posted by Jim on Jun 01 2023

    Great price great oil

Bizrate 2023 Platinum Seven Time Winner

Safety Data Sheet
Product Data Sheet
Phillips 66 20W-50 Differences

Due to these products being hazardous, an additional shipping charge of $25.00 is automatically added to smaller "Ground Shipments". If you can order any combination of products that makes your total cart weight over 150 lbs. (which is considered "Freight Shipment"), this additional fee is waived. This can equate to considerable savings on shipping.

Sunoco Race Fuels is offering a Free Drum Pump with the purchase of a 54 Gallon Drum of Sunoco E85-R 99 Octane Race Fuel.
To add the free drum pump, first add the '54 Gallon Drum' to the cart, then click the blue 'Add FREE Drum Pump' button.

By entering your amount in the “Quantity” field, the price will automatically reflect the bulk discount below.