I wonder if the specs from the 10+ year old MSDS still apply? The pour point looks good for a highly refined mineral oil, IMO.
SAFETY DATA SHEET
SHOWA SHELL SEKIYU
KABUSHIKI KAISHA
ISSUED: FEBRUARY 5, 1998
SUBARU EXTRA GEAR OIL S 75W-90
1. IDENTIFICATION OF THE SUBSTANCE/PREPARATION AND COMPANY
PRODUCT NAME: SUBARU EXTRA GEAR OIL S 75W-90
PRODUCT TYPE: GEAR OIL
SUPPLIER: SHOWA SHELL SEKIYU KABUSHIKI KAISHA
ADDRESS: DAIBA FRONTIER BUILDING, 3-2 DAIBA 2 CHOME,
MINATO-KU TOKYO 135 JAPAN
2. COMPOSITION/INFORMATION ON INGREDIENTS
PREPARATION DESCRIPTION:
BLEND OF HIGHLY-REFINED MINERAL OILS AND ADDITIVES.
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE: LIQUID AT AMBIENT TEMPERATURE.
COLOUR: YELLOW LIQUID
ODOUR: CHARACTERISTIC MINERAL OIL
INITIAL BOILING POINT: EXPECTED TO BE ABOVE 280 DEG. C
VAPOUR PRESSURE: EXPECTED TO BE LESS THAN 0.5 EPA AT 20 DEG. C.
DENSITY: 896 AT 15 DEG. C (KU/M3)
VAPOUR DENSITY (AIR=1): GREATER THAN 1
POUR POINT: -46 DEG. C
FLASH POINT: 192 DEG. C (COX)
FLAMMABILITY LIMIT - LOWER: 1 % VI/VI
FLAMMABILITY LIMIT - UPPER: 10 % VI/VI
AUTO-IGNITION TEMPERATURE: EXPECTED TO BE ABOVE 320 DEG. C
SOLUBILITY IN WATER: NEGLIGIBLE
http://rtk.complyplus.com/msds/frame.asp?sheetid=1145208
-Dennis