Royco® 482 is a light green rust and corrosion preventative oil commonly used to preserve aircraft internal combustion engines. The ashless anti corrosion additive package and highly refined petroleum base oil protect the engine by minimizing the effects of humidity and neutralizing the acidic components of engine oil oxidation and combustion by-products.

Royco® 482 is normally used as a preservation grade oil for engines or engine parts and accessories during moderate outdoor to long term indoor storage periods. This oil can also be used as a "flyaway" oil for reciprocating engines, however; operation of engines preserved with Royco® 482 should be limited to a maximum of fifty hours before oil change.

The engine to be preserved should be filled to normal capacity with Royco® 482 and then run at idle until the engine reaches normal operating temperature (approx. 10-15 minutes). Upon shutdown, the internal surfaces of the engine are now protected from rust and corrosion.

Turbine engines using synthetic engine lubricating oils should use MIL-C-8188 corrosion preventative concentrate. Turbine engines using lubricants compatible with mineral based fluids should use Royco® 483 corrosion preventative.