Phillips 66 Type A 100AW Aviation Oil is an ashless dispersant, single-grade engine oil pre-blended with the correct concentration of antiwear additive (LW-16702) mandated by Lycoming Service Bulletins 446, 471 and Service Instruction 1409. It is recommended for use in opposed piston and radial piston aircraft engines where cam lifter wear is a concern.
The ashless dispersant formulation helps minimize the formation of engine sludge, varnish, piston deposits and combustion chamber deposits. This results in a much cleaner engine compared to the use of straight mineral oils. This oil has a high-viscosity index and low pour point compared to other single-grade aircraft engine oils, allowing its use over a wide temperature range.
Type A 100AW Aviation Oil is FAA approved as an alternate method of compliance to AD80-04-03 R2, paragraph b.1.