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

Phillips 66 X/C (Cross-Country) Aviation Oil 20W-50 is an ashless dispersant, multigrade engine oil specially formulated for year-round use in aircraft piston engines. It provides distinct performance benefits compared with single-grade engine oils, including easier starting and faster oil circulation at low temperatures, reduced warm-up time, and reduced oil consumption in most engines.

Phillips 20w50 aviation oil maintains its film strength under high loads and at high temperatures to protect against wear and piston scuffing. The ashless dispersant formulation helps minimize the formation of engine sludge, varnish, piston deposits and combustion chamber deposits, resulting in a much cleaner engine compared with the use of straight (nondispersant) mineral oils.

Phillips XC 20w50 was the first FAA-approved mineral oil-based, ashless dispersant, multiviscosity aviation engine oil. It has more than 30 years of outstanding, proven performance in a wide variety of aviation uses, including flight schools, charter and cargo airlines, acrobatic aircraft, spray planes, race planes and virtually any other general aviation application. It is available throughout the United States and is exported to other countries around the world.


  • Ashless dispersant helps minimize engine sludge and varnish deposits for a cleaner engine
  • Easier starting and faster oil circulation at low temperatures compared with single-grade oils
  • Reduced warm-up time and cooler operating temperatures compared with single-grade oils
  • High film strength for protection against wear and piston scuffing, even under high-load conditions, such as takeoff, and at elevated operating temperatures
  • Provides cleaner and quicker break-in than traditional all-mineral, non-additized, single-grade oils
  • Protects against rust and corrosion
  • Reduces oil consumption in most engines
  • Suitable for year-round use


This product is recommended for use in opposed piston engines. It can replace Commercial Grade 65, 80 or 100 single-grade engine oils with no sacrifice in performance.

This oil is recommended for use during break-in and then as the operational oil until TBO.





92 Reviews | Write a Review.

  • 5
    Phillips X/C engine oil

    Posted by Jeff Lowe on Mar 13 2023

    Great customer service and price.

  • 3
    It's oil!

    Posted by Ed Borstel on Mar 08 2023

    We switched from straight-weight Aeroshell oil to the Phillips Multi-viscosity oil due to availability and price. So far we have been pleased with the performance of the Phillips product.

  • 5
    Phillips 20/50 c/X aviation oil

    Posted by Ed Scroggy on Mar 02 2023

    Appreciate the quick service and delivery

  • 5
    Great Product

    Posted by James Spradling on Feb 27 2023

    Great produce and fast shipping.

  • 5

    Posted by Dan M on Feb 20 2023

    Best value and easiest ordering method. Ordered in the past and never had an issue with products or delivery

  • 5
    Fast Shipping - Great Price

    Posted by Sree on Jan 20 2023

    This review is not about the product (oil is oil) but PSC’s service. PSC has consistently provided the lowest prices (even after adding shipping cost) and fast shipping. I will keep buying oil for my aircraft from here.

  • 5
    Phillips XC

    Posted by John Majane III on Dec 05 2022

    This oil is the least expensive and recommended by Mike Bush and others. I changed from Aeroshell 15W50 to this and the leaks in my old engine are almost non existent now. I do add camgaurd with it for protection of the internals but even so it is less money then the Aeroshell. Use year round.

  • 5
    Aviation oil

    Posted by Todd Harvey on Nov 11 2022

    Great price fast shipping

  • 5
    Always prompt service

    Posted by n/a on May 24 2022

    My order was what I ordered and it arrived sooner than I had anticipated.

  • 5
    Quick service

    Posted by n/a on May 11 2022

    All was taken care of in a timely fashion

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