1979-2019 FOUR DECADES OF YEAR-ROUND PROTECTION. From the tundra to the tropics. Break-in to overhaul. And all the journeys in-between. For 40 years, Phillips 66 X/C has protected aircraft with the leading multiviscosity, mineral oil-based aviation oil-X/C 20W-50. And we continue to deliver the products pilots require with our full line of single and multiviscosity aviation engine oils. ® ® See them all at AVIATIONOIL.COM © 2019 Phillips 66 Company. Phillips 66 and its respective logos and products are registered trademarks of Phillips 66 Company in the U.S.A. and other countries.http://www.AVIATIONOIL.COM