Phillips 66 X/C 20W50 Aviation Oil is an FAA approved oil made for aircraft piston engines. It is an ash less dispersant specifically made for year round use.  It has excellent performance benefits including easier starting, reduced warm up time, and reduced oil consumption in most engines. This product is recommended for use in opposed piston engines and it can replace commercial grade 65, 80 or 100 single grade engine oils with no sacrifice in performance.

Meets the requirements of:
Avco Lycoming Material Spec No. 301G
Pratt & Whitney Service Bulletin No. 1183 Rev. U
SAE Standard J1899
U.S. Military Spec. MIL-L-22851D

PHILLIPS 66 XC AVIATION OIL

Information on Phillips 66 20W50 Oil