Aeroshell Fluid 31 is a synthetic hydrocarbon based aircraft hydraulic fluid with greatly improved fire resistance characteristics when compared with conventional petroleum products. Has specialty designed base stock which imparts a relatively high flash point, low temp properties, and good oxidation and thermal stability. In addition, Aeroshell Fluid 31 is formulated with high technology additives to provide oxidation and corrosion resistance, antiwear, and anti-foaming protection.