Castrol Brayco 599 serves as an additive for turbine engines and helicopter transmissions utilizing MIL-PRF-23699 lubricating oil. Recommended for addition to the oil sump immediately post-oil change, especially for equipment intended for storage in high humidity or salt spray environments. Its usage is limited to 25 hours. Refer to the engine manufacturer’s manual for precise model recommendations and restrictions. When used with MIL-PRF-23699 synthetic turbine oils, Castrol Brayco 599 is added at a volume of 10-15% for storage purposes.
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