These earlier-generation hydraulic fluids were designed for standard pressure systems; they provided basic wear protection, oxidation resistance, and fluid stability in general industrial applications. While no longer aligned with modern performance standards, they remain suitable for legacy machinery or environments where newer specifications are not required.
AeroShell Fluid 71 is a preservative-grade mineral hydraulic fluid designed for aircraft systems, offering enhanced corrosion protection, oxidation stability, and compatibility with MIL-spec aviation hydraulic components.
AeroShell Fluid 31 is a synthetic hydrocarbon-based hydraulic fluid engineered for aircraft systems, offering exceptional fire resistance, thermal stability, and low-temperature performance across a wide operating range.