The diagram below indicates the minimum and maximum viscosities in centistokes for equivalent ISO-VG grades at temperature 40oC.
ISO VG stands for "International Standards Organization Viscosity Grade" and is a number ranged from 2 to 1500.
Equivalent Viscosity of ISO-VG Grades at 40oC and SAE Crankcase Oil Grades
ISO-VG Grade | SAE Crankcase Oil Grade |
22 |
5W |
32 |
10W |
46 |
15W |
68 |
20W |
100 |
30 |
150 |
40 |
220 |
50 |
320 |
60 |
Equivalent Viscosity of ISO-VG Grades at 40oC and SAE Aircraft Oil Grades
ISO-VG Grade | SAE Aircraft Oil Grade |
100 |
65 |
150 |
80 |
220 |
100 |
320 |
120 |
Equivalent Viscosity of ISO-VG Grades at 40oC and SAE Gear Lube Grades
ISO-VG Grade | SAE Gear Lube Grade |
46 |
75W |
100 |
80W-90 |
220 |
90 |
460 |
85W-140 |
1500 |
250 |
Equivalent Viscosity of ISO-VG Grades at 40oC and AGMA Gear Lube Grades
ISO-VG Grade | AGMA Gear Lube Grade |
Regular | EP |
46 |
1 |
|
68 |
2 |
2 EP |
100 |
3 |
3 EP |
150 |
4 |
4 EP |
220 |
5 |
5 EP |
320 |
6 |
6 EP |
460 |
7 |
7 EP |
680 |
8 |
8 EP |
ISO-VG Grades - Absolute Viscosity vs. Temperature, Reyns vs. Fahrenheit
ISO-VG Grades - Absolute Viscosity vs. Temperature, centiPoise vs. Celsius
- tC = 5/9(tF - 32)
- tF = 9/5 tC + 32
- 1 reyns (lb s/in2) = 6896.55 (Pa s)
- 1 cSt (centiStoke) = 1 centiPoise / SG
- SG = specific gravity of oil