AeroShell Turbine Oil 555
AeroShell Turbine Oil 555 is an advanced 5 mm2/s synthetic hindered ester oil incorporating a finely balanced blend of additives to improve thermal and oxidation stability and to increase the load carrying ability of the base oil.
U.S. Approved DOD-L-85734.
British Approved DEF STAN 91-100 (Note: both UK and US production are manufactured to the same formulation.)
Joint Service Designation OX-26.
Pratt & Whitney Approved 521C Type II.
General Electric Approved D-50 TF 1.
Allison Approved EMS-53 (Obsolete).
