Phillips 66 X/C Aviation Oil 20w-50 Engine Oil | 12/1 Quart Case

Phillips 66 X/C Aviation Oil 20w-50 Engine Oil | 12/1 Quart Case
25.00 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.

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 (455)
Pour Point, °C (°F) -33 (-27)
Viscosity, Kinematic cSt @ 40°C 159
Viscosity, Kinematic cSt @ 100°C 19.8
Viscosity Index 144
Cold Cranking Viscosity, cP 5,200
@ (°C) (-15)
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

110 Reviews | Write a Review.

  • 5

    Posted by Kurt on Feb 16 2021

    Wonderful oil!

  • 5
    20W50 Phillip Oil

    Posted by Marcos on Feb 10 2021

    Great product, superb price

  • 5
    Phillips XC oil

    Posted by David Figgins on Feb 08 2021

    Good price, fast shipping. Second time I have ordered from them and will do again.

  • 5
    Case of aviation oil

    Posted by Grumpyoldguy on Feb 02 2021

    No muss no fuss. Ordered the oil and it showed up in a few days. Just like you want it to

  • 5
    Phillips XC 20W 50

    Posted by Stevens David on Jan 21 2021

    Great price on the oil makes up for the high price of shipping! Overall a good deal on the oil and cheaper than I can buy it locally.

  • 5
    Aero shell oil

    Posted by Jeffrey Sell on Jan 18 2021

    Great service, great quality airplane engine oil

  • 5

    Posted by Garrett Westenburg on Jan 07 2021

    Great oil for a great price.

  • 5
    Phillips 66 X/C 20W-50 Aviation OIl

    Posted by Leo on Dec 24 2020

    A dependable variable viscosity AD mineral oil for my airplane.

  • 5
    Aviation Oil

    Posted by GG on Dec 16 2020

    Shipped quickly. Arrived as expected. Wish they sold oil filters.

  • 5
    Phillips x av. Oil

    Posted by Richard Menning on Dec 14 2020

    Arrived timely. Quality product. Fair price

  • 5

    Posted by TR on Dec 14 2020

    Well packaged, prompt delivery.

  • 5
    Best Price for Aviation Oil Found Here

    Posted by Raymond Ebner on Dec 14 2020

    I have not been able to find my aviation oil less expensive than PSC. They are always quick on shipping too.

  • 4
    Perhaps best oil after Exxon Elite vanished

    Posted by Shalom Wertsberger on Nov 20 2020

    This is a good oil for a reasonable price (from PSC, not all others). I used to use the late Exxon Elite, which truly worked great, but this is second best.

  • 5
    Our old 0-540 seems to love this oil

    Posted by Roy S. Cantrall on Nov 16 2020

    Good oil for a GOOD PRICE

  • 5

    Posted by n/a on Nov 02 2020

    Just what I ordered!!

  • 5
    20W50 XC Phillips 66 oil

    Posted by Dennis Jokerst on Oct 26 2020

    Delivery time excellent - will buy again! thank you.

  • 5
    Excellent oil

    Posted by n/a on Oct 20 2020

    excellent oil, excellent price, fast delivery! I highly recommend this

  • 4
    Phillips 66 XC 20W-50 Oil

    Posted by Thomas on Oct 16 2020

    Fine Product

  • 5
    Great Product

    Posted by Susan Ash on Oct 05 2020

    Great Product and very fast shipping!

  • 5
    Phillips x/c aviation oil

    Posted by James Dugan on Oct 01 2020

    Fast shipping

  • 5
    Aircraft Oil

    Posted by Tammy Unzicker on Sep 15 2020

    We have been using this oil for years, it is excellent. PSC delivered fast and for a fair price.

  • 5
    Phillips 66 X/C Distributed by PSC.

    Posted by Volare Aviation LLC on Sep 02 2020

    The guys at PSC are the best! Great price, great service and very FAST delivery!

  • 5
    Good Oil at a Good Price

    Posted by Alex D on Aug 20 2020

    Best price around! I put it un my planes and my harley

  • 5
    Phillips X/C Aviation Oil

    Posted by John Vesey on Aug 04 2020

    This vendor is the best price we could find.

  • 5
    Great Service

    Posted by Mark C on Jun 25 2020

    Delivered on time great price great service

  • 5
    Phillips 66 x/c

    Posted by Harry on Jun 16 2020

    Shipment arrived quickly, no damage.

  • 5
    Aviation Oil

    Posted by Louis on Jun 15 2020

    PSC is the best! Great products at good prices with fast delivery - thank you!

  • 5
    Phillips XC oil from Petroleum Service

    Posted by Steve on May 25 2020

    Fast shipping. Priced better than my FBO. Can’t go wrong with service and delivery from Service Petroleum. Best in class!!

  • 5
    Phillips X/C 20W50

    Posted by HStoebs on May 25 2020

    good lubricant

  • 5
    Phillips 20w50 x/c

    Posted by Mike tappenden on May 22 2020

    Great price and fast shipping

  • 5
    Phillips 66 aviation oil

    Posted by Helmut on May 21 2020

    Great oil. Excellent fast service!

  • 5
    Good product, good price

    Posted by Richard Brunett on May 18 2020

    Good service from PSC.

  • 5

    Posted by John Hrubos on Apr 07 2020

    The oil, of course, was exactly as ordered. The delivery was quick and very fast. I am very pleased with the transaction.

  • 5
    Aviation oil

    Posted by Monkeys uncle on Mar 31 2020

    PSC got this case of oil out to me right away. Great job!

  • 5
    Phillips 20W-50

    Posted by Chuck on Mar 26 2020

    This is my first time doing business with Petroleum Service Company. I ordered 2 cases of Phillips 20W-50. The oil was delivered to my house in a few days , The cost, including shipping costs, was significantly less than buying from a local supplier and was conveniently delivered to my house. Prompt service and cost savings. What more can you ask for?

  • 5
    Product delivered as advertised.

    Posted by None on Mar 20 2020

    Product delivered as advertised.

  • 5
    XC Oil

    Posted by Gary Garavaglia on Mar 16 2020

    Quick shipping, arrived in good condition and very good pricing. Can’t ask for more than that.

  • 5
    Phillips 66 X/C SAE 20-50

    Posted by Gary Soloway on Mar 15 2020

    I won’t review the product because it is well documented as a premiere aviation oil. I use about 2 cases a year and have found Petroleum Services easy to order online from with good pricing, fast service and realistic shipping cost. I like their follow up/shipping notifications. I am not much on giving reviews, but feel it is worth my time to support a good company like PSC.

  • 5

    Posted by Ed Hanson on Jan 20 2020

    Great service, great product and a fantastic price! What else can you say?

  • 5

    Posted by Sam Swihart on Nov 20 2019

    I’ve been complaining for years about not having a convenient and reasonably priced method of obtaining my aviation oil, now I can stop griping, thanks PSC

  • 5
    Product as expected - super fast service

    Posted by None on Nov 06 2019

    PSC always does a great job shipping my order out fast. Product arrived as expected.

  • 5
    Good service from PSC

    Posted by Dennis on Oct 23 2019

    I used to run Phillips a long time ago, but had switched to Exxon Elite for better than 10 years. Now that EE is no longer available, I'm back to Phillips X/C with Camguard. Will have to see how my Lycoming likes it. PSC has the best price and shipping was prompt.

  • 5
    Great product

    Posted by None on Oct 22 2019

    Best price

  • 5
    Best Price

    Posted by None on Oct 06 2019

    Best Price I can find anywhere. Reliable and quick delivery.

  • 5
    Quality Aviation Oil at a great price!

    Posted by Awesome on Aug 28 2019

    Quick shipping and a great price makes buying a case of Phillips 66 X/C 20W-50 a no-brainer!

  • 5
    Quick delivery

    Posted by Scott on Aug 04 2019

    Always impressed with the quick response and delivery. Will buy again.

  • 5
    Aircraft Oil

    Posted by CHARLIE LAMBERT on Aug 01 2019

    I'm no expert at engine oils. The flying magazines and pilot association rags say the Phillips 66 is best, so that's what I've used for the last 15 years. Seems to be doing well. The other thing I use is Camguard Oil Additive, to enhance oil performance and resist corrosion during periods when I can't fly. I WISH PETROLEUM SERVICE WOULD STOCK THAT AS WELL, SO I CAN ORDER ALL OIL CHANGE SUPPLIES FROM A SINGLE PLACE!

  • 5
    Great air- cooled oil

    Posted by none on Jul 03 2019

    My engine seems to run the best on this oil, and I use it year round in Minnesota.

  • 5
    Phillips Aviation Oil

    Posted by J Stephenson on Jun 05 2019

    I have used this oil for years in my Cessna's and am very happy with it. I have had no issues with my engines.

  • 4
    Case of Philips XC 20W-50 at a great price

    Posted by Roy I on Jun 03 2019

    PSC ships fast and the price is extremely competitive.

  • 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
    Great service

    Posted by Mike Roche on Mar 23 2019

    Good prices and quick turn around!

  • 5
    A great four-season multi-weight oil

    Posted by William Scott on Mar 15 2019

    PSC is hands down the winter of low prices and fast delivery.

  • 5
    Good oil

    Posted by None on Nov 19 2018

    Good oil and good price and delivery.

  • 5
    The best for old Cessnas

    Posted by Rick on Nov 04 2018

    I love this oil, and this PSC is the best place to get it. Best price and super fast shipping. Can't beat it!

  • 5
    Extremely Fast Shipping - Best Price

    Posted by None on Sep 13 2018

    This is the only place I order aircraft oil from. They always have the lowest price when you include shipping costs, and they ship extremely fast.

  • 5
    Excellent Service

    Posted by None on Sep 11 2018

    I have purchased this product several times from PSC and service is excellent. I always have it in a couple of days....and the price is right.

  • 5
    Best band per buch for aviation oil

    Posted by None on Aug 31 2018

    Our airplane has always used this oil. We bought more from PSC because they had the best price. It arrived more quickly than I expected.

  • 5
    Thanks for the quick shipping.

    Posted by None on Jul 22 2018

    Fast shipping, fair price and great service!

  • 5
    Great product and fast delivery by PSC

    Posted by None on Jul 02 2018

    Have used this product for many years with zero problems. I always order from PSC as their prices are good, and delivery is always fast

  • 5
    Good stuff

    Posted by Rick on Jun 22 2018

    best price I found on the internet, and the best stuff for my Continental 0-300!

  • 5
    Very slippery!

    Posted by None on May 18 2018

    Totally pleased with this lubricant. Engine continues to run normally after putting it in.

  • 5
    Best prices online!

    Posted by Doug Pahnke on May 14 2018

    Been using Philips 20-50XC for years in plane. Never a problem. I do my own oil changes so look for suppliers providing good services and pricing. PSC meets those requirements. Fast shipping, reasonable.

  • 4
    Awesome shipping

    Posted by MoonLady on May 05 2018

    Shipping was faster than the speed of light! Thanks!

  • 5
    aviation oil

    Posted by Ricciardo on Apr 30 2018

    Great product, great price, fast delivery.

  • 5
    Oil for my engine

    Posted by Es Ef on Apr 16 2018

    I put this oil in my engine and it runs so smooth. Almost time for another oil change so I needed to stock up. Shipment seemed to arrive really fast too. But this is my 3rd purchase in a year and a half and I have to say that your prices continue to creep up.

  • 5
    Philphs 20-50 aviation’ oil

    Posted by Mario Carrasco on Mar 13 2018

    Product was promptly delivered great job!

  • 5
    Great product

    Posted by bernie on Mar 07 2018

    Order was delivered very quickly. Great job

  • 5
    Fast service!

    Posted by Gerry on Mar 01 2018

    Easy to order. Arrived quickly. Best price. What's not to like?

  • 5
    Phillips 66 X/C Aviation Oil 20W50 is the Best

    Posted by Joe on Jan 30 2018

    Excellent oil for my aircraft. All my oil analysis results at oil changes have been much better than average. Petroleum Service Company has the best online price and fast efficient shipping. They are now my go to dealer.

  • 5
    Phillips 20-50 x/c

    Posted by windy on Jan 28 2018

    By far, the best price for this aviation oil, even after adding in the shipping cost. Fast delivery, too.

  • 5
    Best Buy!

    Posted by John on Jan 16 2018

    Best price for Phillips X/C aviation oil shipping was fast and affordable.

  • 5
    Super Service! Super Price!

    Posted by Gary Soloway on Jan 09 2018

    I gave them 5 stars because their website was straight forward and easy to use. They communicated the status and let me know what was happening to my order. I’m a first time buyer here and appreciate the way they do business. I’ll be back!

  • 5
    Aviation oil

    Posted by Skip Curtis on Dec 26 2017

    Product arrived on time as stated. Cost was a significant savings over other sellers! We were very pleased!!

  • 5
    Great product

    Posted by None on Dec 05 2017

    We have two rental/training airplanes at a small airport. Since we operate on a small budget, it is important to find a good product at a great price, and this it it.

  • 5
    Great Product & Good Price

    Posted by None on Dec 04 2017

    Quick ship and exactly what was ordered/expected. Thanks!

  • 5
    Best Price for Aviation Oil Found Here

    Posted by Ray on Dec 04 2017

    I have been using Phillips XC 20-50 as a year round oil for years in my aircraft. I stumbled upon PSC a while back and they are a very good source for this product.

  • 5
    It’s oil

    Posted by Tony C on Nov 27 2017

    Good price, quick shipping.

  • 5
    Great out fit

    Posted by TIM ALLEN on Oct 23 2017

    Friend told me about PSC. Excellent service and great price.

  • 5
    Good oil Better Company

    Posted by Mike on Oct 13 2017

    Found PSC by accident. Great customer service with exceptional pricing. I will become long term user of the service they provide. When you dump your oil every 25 hours I can see saving money using them for my supplier.

  • 4
    Just changed over from Exxon Elite

    Posted by Jim on Oct 12 2017

    I've used Exxon Elite in my Tiger since 2012 when I purchased it. Based on the Aviation Consumer comparison of airplane engine oils and additives, Exxon Elite's anti-corrosion performance is similar to Phillips XC 20w-50 plus Camguard additve, and the price was lower because of high shipping charges for the Phillips oil. With Petroleum Service Company's new, more competitive shipping charges the economics have changed in favor of the Phillips oil, so I made the change. Expecting continued good service from my new oil.

  • 5
    I'm happy

    Posted by Woodsguy on Oct 03 2017

    Great ol, great price, timely delivery. I'm Happy!

  • 4
    Well laid out website, prompt delivery

    Posted by Peter on Sep 14 2017

    Good service from this company, browsed for best price/delivery and found PSC to be the best.

  • 5
    Quality Product

    Posted by Jack Moran on Sep 12 2017

    I'm very satisfied with PSC products and service.

  • 5
    Correct Oil Shipped Quickly and Inexpensively

    Posted by Jimmy on Aug 30 2017

    PSC is awesome! Cheaper and quicker than everyone else for oil. I live in the NE so this is a satisfactory hybrid that I use all year (with pre-heat in the winter). Have been using it with great success on both airplanes I currently own (PA28 and PA34)

  • 5
    Another Satisfied Customer

    Posted by Dave H on Aug 09 2017

    I have used this oil for 1100 hours since the 2014 major overhaul of my IO-550-N and the Blackstone oil reports have all been excellent. Furthermore, I have made numerous purchases from PSC and have always been delighted with the reasonable prices, easy check-out and great delivery.

  • 5
    Re Order

    Posted by Richard on Jun 19 2017

    I haave used this product over the last 8 years and my engine has gone to TBO with no issues.

  • 5
    No hassle ordering

    Posted by steve on Jun 14 2017

    Ordering was easy, the delivery was quick, and the price was the most reasonable I could find.

  • 5
    quick and easy

    Posted by Dite Steinruck on May 23 2017

    I ordered two cases (cheaper shipping that way) and got them in less than a week. Price was best I could find anywhere including shipping!

  • 5
    Great price and service!

    Posted by curtis on May 18 2017

    I ordered 2 cases of oil for my Cirrus SR22T for half the price my mechanic was charging for oil changes. PSC shipped timely and its a great deal!

  • 5
    Best value in multi oil

    Posted by Andy on May 05 2017

    I fly a lot and want a reasonable cost multi grade oil. XC does it, no rust or we wear issues like others

  • 5
    Top Notch

    Posted by Brian on Apr 11 2017

    0% nonsense, 100% satisfaction, at a price that can't be beat. These guys know what they are doing.

  • 5
    Unbeatable Price

    Posted by Dale on Apr 06 2017

    PSC offers this cheaper than anyone else. Shipping is always fast. The package always arrives clean and intact.

  • 5
    Lightning fast delivery and best price out there

    Posted by James R. Wilson on Mar 13 2017

    Exactly what my plane needed for another 50 hours of use! Shipping was fast and reasonably priced. No fuss as I needed the oil, PSC had it and after a few clicks it was at my doorstep in a couple of days. Thank you for a great experience and I hope to be a long-term customer of yours.

  • 5
    Great Service

    Posted by None on Feb 27 2017

    Fast delivery,great price!

  • 5
    Great vlaue

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

    Always get deliver in a couple days. Great value on a great product.

  • 5
    Great Service

    Posted by Rick Rozhon on Feb 07 2017

    Very satisfied with the quick service, price and product.

  • 5
    Good value

    Posted by Jack Moran on Jan 26 2017

    Fast service...very satisfied.

  • 5
    Works good lasts long time

    Posted by Mike D. Delaware on Jan 26 2017

    You guys make ordering easy and get the product shipped right away.

  • 5
    Good Service

    Posted by Thomas Kracmer on Jan 23 2017

    Good product and quick service. I'm a satisfied customer.

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