Turbine Engine Oils - VPS Lubricants

NOTES128Turbine Engine OilsTable continuedPROPERTIES DEF STAN 91-98 TYPICALFlashpoint ClevelandOpen Cup °C 216 min 242Pourpoint °C −54 max Below −54Total Acidity mgKOH/g Report 0.03Foaming characteristics Must pass PassesSediment mg/l 10 max Less than 10Total ash of sediment mg/l 1 max Less than 1Trace element content Must pass PassesElastomer swell tests Must pass PassesCorrosivity, metal weight change Must pass PassesGear Machine Rating Must pass PassesShear Stability– viscosity change @ 40°C % 2 max Less than 2– condition of oil Must pass PassesCompatibility and miscibility Must pass PassesHomogeneity@ 210°C Must pass Passes@ –40°C Must pass PassesTurbine Engine Oils129A viscosity/temperature chart is shown at the end of this section.www.shell.com/aviationThe AeroShell BookEdition 18 2003