Eastman? Turbo Oil 2380 is still one of the most widely used turbine oils in the commercial aviation industry. It was one of the first turbine oils to be qualified and approved for Mil-PRF-23699 STD (Standard) class and subsequently SAE AS5780 SPC (Standard Performance Capability) class. If you?re looking for exceptional accessory performance then Eastman? Turbo Oil 2380 delivers, with extended on-wing accessories lifespan and improved reliability. Eastman? Turbo Oil 2380 has also been found to neutralise the effects of Copper (Cu) ? with superior metal passivation results showing reduced oxidation and sludge formation.