Eastman HALO 157 is a purpose-designed, high-load carrying helicopter gearbox lubricant that offers improved lubrication performance and better corrosion protection than conventional high-load carrying turbine oils. This product is fully compatible and miscible with other oils approved to specifications MIL-PRF-23699 and MIL-PRF-7808. HALO 157 is a higher viscosity (9 cSt) advanced helicopter gearbox lubricant and is currently in service with the United Kingdom MoD and is being evaluated by the U.S. Military.
