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Oil: SAE Definitions

SAE Grades and Physical Properties

From Infinium... go look

http://www.infineum.com/information/passenger.html

 
SAE Viscosity Grades For Engine Oils(1)
SAE Viscosity Grade Low Temperature (C) Cranking Viscosity(2), cP Max Low Temperature (C) Pumping Viscosity(3), cP Max With No Yield Stress Kinematic Viscosity(4)(cSt) at 100C Min Kinematic Viscosity(4)(cSt) at 100C Max High-Shear Viscosity(5) (cP) at 150C and 106 s-1 Min
0W 6200 at -35 60,000 at -40 3.8 - -
5W 6600 at -30 60,000 at -35 3.8 - -
10W 7000 at -25 60,000 at -30 4.1 - -
15W 7000 at -20 60,000 at -25 5.6 - -
20W 9500 at -15 60,000 at -20 5.6 - -
25W 13000 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, and 10W-40 grades)
40 - - 12.5 < 16.3 3.7 (15W-40, 20W-40, 25W-40, 40 grades)
50 - - 16.3 < 21.9 3.7
60 - - 21.9 < 26.1 3.7
Note-1cP = 1mPa s; 1 cSt = 1mm2/S
(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, CEC L-36-A-90 (ASTM D4741 and D5481)

 

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