Viscosity, @ 40ºC, cSt (ASTM D445) 45.08. Viscosity Index 174. Compare this to the recommended high moly Mazda 0W-20: Kinematic Viscosity at 100 degrees C (cSt) 8.3. Kinematic Viscosity at 40 degrees C (cSt) 35.0. Viscosity Index 225. Viscosity Index (VI) is an arbitrary scalar value that indicates the change in an oil’s viscosity with.