Phillips 66 X/C Aviation Oil 20w-50 Engine Oil | 4/1 Gallon Case

Phillips 66 X/C Aviation Oil 20w-50 Engine Oil | 4/1 Gallon Case
32.00 LBS
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Phillips 66 X/C 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.





13 Reviews | Write a Review.

  • 5
    4gal. Oil

    Posted by Chuck weeber on Jun 15 2021

    Well done

  • 5

    Posted by n/a on Nov 02 2020

    Just what I ordered!

  • 5
    The service

    Posted by Jaffe LeTourneau on Jun 15 2020

    I ordered it one day and had it 4 days later. I ended up calling them since he invoice did not have my discount on it but they said it's right on the billing. About a 1/5 of the shipping cost was covered by the sales tax I didn't have to pay that and the discount makes the cost of the oil just a little less than what I would pay locally if I wanted to kill half a day driving to where I can buy it.

  • 5
    Use with CamGuard

    Posted by Cameron on May 07 2020

    I use low cost Phillips 20W50 with CamGuard to provide corrosion protection for my Lycoming O-360. It works great!

  • 5
    Best Price for Aviation Oil Found Here

    Posted by Ray on Mar 05 2020

    This is the best price I have found for my aircraft oil. Thank you PSC.

  • 5
    Good Price Point

    Posted by Mark on Dec 06 2019

    Will definitely recommend to my friends

  • 5
    Good price, Fast shipping.

    Posted by Dan on Apr 04 2019

    Easy to check out the purchase on the internet. Fast service and shipping.

  • 5
    Easy to do business!

    Posted by Doug on Oct 12 2017

    Great price with reasonable shipping charges. Fast service!

  • 5
    Price is great

    Posted by kyle j on Oct 02 2017

    Shipped fast and no hassel of making trip to store.

  • 5

    Posted by Kdawg on Sep 12 2017

    Delivered promptly and for a great price, gallon volume is the way to go.

  • 5
    Fast Oil Changes

    Posted by Jeff Munford, "Comanche Flyer" on Feb 09 2017

    Love the gallon containers at oil change time. Coupled with a wide mouth funnel and adding 9 qts of oil after a change only takes a minute.

  • 5
    Great Value!

    Posted by Jim on Jan 06 2017

    Price is great and shipping very reasonable. I'm also impressed with the speed of my order delivery. Looking forward to my next order with you folks.

  • 5
    Love the gallon jugs for doing oil changes

    Posted by Jeff on Dec 05 2016

    The gallon jugs are the way to go when doing an oil change, the 20/50 multi grade oil it great I used to use straight weight Shell 100 but this oil makes it so I have no problem starting even at 35 degrees F. I just wish they had a multi grade with the Lycoming additive, currently I use the straight weight additive oil in the summer and 20/50 the rest of the year.

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