Royco® 581 is a concentrated version of a highly refined base oil with added ashless, anti-corrosion additive technology. Royco® 581 is designed to act as a preventative & protect aircraft engines from rust and corrosion as well as effects of humidity or acidic components from engine oil oxidation. Royco® 581 is also suitable for use as a preservative for industrial gasoline/diesel fueled engines, industrial gearboxes and machine tools.
Kinematic Viscosity, cSt (@ 100 °F): 278
Kinematic Viscosity, cSt (@ 210 °F): 21.1
Pour Point, (°F): 0
Flash Point, (°F): 525
Specification: MIL - C - 6529 TYPE 1
MIL-SPEC Scope: This specification covers an oil-type corrosion preventative which shall be a satisfactory lubricant for aircraft engines when applied as specified.