SAE Viscosity Classification

ENGINE OIL (SAE J300)
SAE Viscosity Grade Low Temperature (°C) Cranking Viscosity2, mPa.s Max Low Temperature (°C) Pumping Viscosity3, mPa.s Max with Yield Stress Kinematic Viscosity4 (mm2/s) at 100°C Min Kinematic Viscosity4 (mm2/s) at 100°C Max High-Shear Viscosity5 mPa.s at 150°C and 106s-1 Min
0W 6,200 at -35 60,000 at -40 3.8 - -
5W 6,600 at -30 60,000 at -35 3.8 - -
10W 7,000 at -25 60,000 at -30 4.1 - -
15W 7,000 at -20 60,000 at -25 5.6 - -
20W 9,500 at -15 9,500 at -15 5.6 - -
25W 13,000 at -10 60,000 at -15 9.3 - -
20 - - 5.6 < 9.3 2.6
30 - - 9.3 < 12.5 2.9
40 - - 12.5 < 16.3 2.9 (0W-40, 5W-40, 10W-40)
40 - - 12.5 < 16.3 3.7 (15W-40, 20W-40, 25W-40, 40)
50 - - 16.3 < 21.9 3.7
60 - - 21.9 < 26.1 3.7

1 All values are critical specifications as defined by ASTM D3244.
2 ASTM D5293.
3 ASTM D4684. Note that the presence of any yield stress detectable by this method constitutes a failure regardless of viscosity.
4 ASTM D445.
5 ASTM D4683, CECL-36-A-90, ASTMD 4741 and D5481.

AXLE & MANUAL TRANSMISSION LUBRICANT (SAE J306)
SAE Viscosity Grade Maximum Temperature for
Viscosity of 150,000 cP, °C
Viscosity (cSt) @ 100°C Min* Viscosity (cSt) @ 100°C Max Approx. Equivalent ISO Grade
70W -55 4.1 NR 22 - 32
75W -40 4.1 NR 22 - 46
80W -26 7.0 NR 46 - 100
85W -12 11.0 NR 100 - 150
80 NR 7.0 < 11.0 46 - 100
85 NR 11.0 < 13.5 100
90 NR 13.5 < 18.5 150 - 220
110 NR 18.5 < 24.0 220 - 320
140 NR 24.0 < 32.5 320 - 460
190 NR 32.5 < 41.0 680
250 NR 41.0 NR 1000

NR: No Requirement.
* Limit must be met after testing in CEC L-45-T-93 (20 hours).