Castrol Brayco 599 is a specially designed synthetic base, dark amber, rust preventative
Brayco 599 is designed for use as an additive for turbine engines and helicopter transmissions
which use MIL-PRF-23699 lubricating oil. Brayco 599 should be added to the oil sump immediately
after an oil change when the equipment is intended to be placed in storage, especially in locations
where high humidity and salt spray are present. The corrosion- inhibited oil should be capable of
limited use, not to exceed 25 hours. Consult the engine manufacturer's manual to determine specific
engine model recommendations and/or limitations.
To receive full protection for extended equipment storage, it is recommended to add Brayco 599 in
concentrations between 10 and 15 percent by volume. Lower concentrations, between 5 and 10 percent,
may be suitable for some component storage applications depending upon storage conditions and
length of storage. Consult the engine manufacturer's maintenance manual or service bulletin to
determine specific engine model dilution ratio recommendations.
Brayco 599 has a maximum recommended shelf life of 9 years from date of manufacture. This shelf
life assumes that the product is stored in its original unopened packaging in ambient temperature
Brayco 599 is used in MIL-PRF-23699 synthetic turbine oils at 10-15% by volume addition for
storage. It meets the requirements of General Electric, Aircraft Engine Group Specification D50TF6-S1.