Knowledge Base

Decoding oil viscosity (table)

How to read the table?

Winter grade oils – temperature in cells where the following data is included:

-  maximum structural viscosity – defines the lowest temperature in which it is fairly easy to start the engine with this oil,

-  maximum pumping possibility – defines the lowest temperature in which we have a chance to start the engine (oil should be forced in by the pump),

Summer grade oils – the values of oil viscosity at 100C and 150C mean:

- stability of lubrication with oil under thermal loads, the higher viscosity, the oil can work at higher ambient temperature in oil volume,

- the higher oil viscosity, the greater resistance of pumping and energy loss and fuel consumption growth

SAE viscosity grade

Maximum structural viscosity CCS [mPa·s]

Maximum pumping possibility [mPa·s]

Minimum kinematic viscosity at temp. of 100°C [mm²/s]

Maximum kinematic viscosity at temp. of 100°C [mm²/s]

Minimum viscosity HTHS 150°C ; [mPa·s]

0W

6200 at -35°C

60000 at -40°C

3.8

 

 

5W

6600 at -30°C

60000 at -35°C

3.8

 

 

10W

7000 at -25°C

60000 at -30°C

4.1

 

 

15W

7000 at -20°C

60000 at -25°C

5.6

20W

9000 at -15°C

60000 at -20°C

5.6

 

 

25W

13000 at -10°C

60000 at -15°C

9.3

 

 

20

 

 

5.6

< 9.3

2.6

30

 

 

9.3

< 12.5

2.9

40

 

 

12.5

< 16.3

2.9 for 0W-40, 5W-40, 10W-40

40

 

 

12.5

< 16.3

3.7 for 40, 15W-40, 20W-40, 25W-40

50

 

 

16.3

< 21.9

3.7

60

 

 

21.9

< 26.1

3.7