Phillips 66 X/C Aviation Oil

X/C® Aviation Oil
Phillips 66® X/C Aviation Oil is an ashless dispersant, multi-grade 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. It 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 (non-
dispersant) mineral oils.

X/C Aviation Oil was the first FAA-approved mineral oil-based, ashless
dispersant, multi-viscosity 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.

Applications
X/C 20W-50 Aviation Oil 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.

X/C 25W-60 Aviation Oil is recommended for use in radial piston engines and
in other aviation piston engines originally designed to run on heavier-grade oils,
such as Commercial Grade 120.

Both viscosity grades are recommended for use during break-in and then as the
operational oil until TBO.

X/C Aviation Oil meets the re 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 Numbers: D07L1-20W-50 (X/C 20W-50), D07L1-25W-60
(X/C 25W-60) X/C® Aviation Oil

Features/Benefits
• 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 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