SAE J300 Viscosity Grades for Engine Oils - December 1999
SAE
Viscosity
Grade
Low Temperature (ºC)
Cranking Viscosity(1),
cP Max.
Low Temperature (ºC)
Pumping Viscosity(2), cP Max.
with No Yield Stress
Kinematic
Viscosity(3) (cSt)
at 100ºC Min.
Kinematic
Viscosity(3) (cSt)
at 100ºC Max.
High-Shear
Viscosity(4), (cP) at 150ºC
and 106 s-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 60,000 at –20 5.6 - -
25W 13,000 at –10 60,000 at -15 9.3 - -
16 - - 6.1 < 8.2 2.3
20 - - 6.9 < 9.3 2.6
30 - - 9.3 < 12.5 2.9
40 - - 12.5 < 16.3 3.5 (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

 

All values are critical specifications as defined by ASTM D 3244.
1 cP=1 mPa.s; 1 cSt=1 mm2s-1

Notes:
(1) ASTM D 5293.
(2) ASTM D 4684. Note that the presence of any yield stress detectable by this method constitutes a failure regardless of viscosity.
(3) ASTM D 445.
(4) ASTM D 4683, CEC L-36-A-90 (ASTM D 4741), or ASTM D 5481.



 

ISO Viscosity Grade Conversions
ISO
Viscosity
Grade
Mid-point
Kinematic
Viscosity
Kinematic Viscosity Limits ASTM, Saybolt
Viscosity Number

 
Saybolt Saybolt Viscosity
SUS
cSt at 40°C (104°F) 100°F (37.8°C)
Min. Max. Min. Max.
2 2.2 1.98 2.42 32 34.0 35.5
3 3.2 2.88 3.52 36 36.5 38.2
5 4.6 4.14 5.06 40 39.9 42.7
7 6.8 6.12 7.48 50 45.7 50.3
10 10 9.00 11.0 60 55.5 62.8
15 15 13.5 16.5 75 72.0 83.0
22 22 19.8 24.2 105 96.0 115
32 32 28.8 35.2 150 135 164
46 46 41.4 50.6 215 191 234
68 68 61.2 74.8 315 280 345
100 100 90.0 110 465 410 500
150 150 135 165 700 615 750
220 220 198 242 1,000 900 1,110
320 320 288 352 1,500 1,310 1,600
460 460 414 506 2,150 1,880 2,300
680 680 612 748 3,150 2,800 3,400
1,000 1,000 900 1,100 4,650 4,100 5,000
1,500 1,500 1,350 1,650 7,000 6,100 7,500



 

Viscosity Ranges for AGMA Lubricant Numbers
Rust and Oxidation
Inhibited Gear Oils
Viscosity Range
 
Equivalent
ISO Grade
Extreme Pressure
Gear Lubricants
AGMA Lubricant No. cSt (mm2/s) at 40°C   AGMA Lubricant No.
1 41.4 to 50.6 46  
2 61.2 to 74.8 68 2 EP
3 90.0 to 110 100 3 EP
4 135 to 165 150 4 EP
5 198 to 242 220 5 EP
6 288 to 352 320 6 EP
7 Compounded 414 to 506 460 7 EP
8 Compounded 612 to 748 680 8 EP
8A Compounded 900 to 1,100 1,000 8A EP

 

Notes:
Viscosity ranges for AGMA Lubricant Numbers will henceforth be identical with those of the ASTM system.
Oils compounded with 3% to 10% fatty or synthetic fatty oils.



 

SAE J306 Automotive Gear Viscosity Classification Axle and Manual Transmission Lubricant Viscosity Classification
    70W 75W 80W 85W 80 85 90 140 250
Viscosity at 100°C min, mm2/s 4.1 4.1 7.0 11.0 7.0 11.0 13.5 24.0 41.0
max, mm2/s No requirement 11.0 13.5 24.0 41.0 No req.
Viscosity of 150,000 mPa.s, max temp °C   -55.0 -40.0 -26.0 -12.0 No requirement
20 hr. KRL Shear (CRC L-45-T-93), KV100 after Shear, mm2/s 4.1 4.1 7.0 11.0 7.0 11.0 13.5 24.0 41.0



 

MIL-PRF-2105E Specification
  75W 80W-90 85W-140
Viscosity at 100°C min, mm2/s 4.1 13.5 24.0
  max, mm2/s - 24.0 41.0
Viscosity of 150,000 mPa.s, max temp °C   -40.0 -26.0 -12.0
Channel Point, min, °C   -45.0 -35.0 -20.0
Flash Point, min, °C   150 165 180

    

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