The quality of vacuum pump oil depends on its viscosity and vacuum, and vacuum is to see the value under different temperature, 

the higher the temperature, the more stable the performance of vacuum is a good oil. 

vacuum pump oil viscosity scope recommended 

1、Piston vacuum pump (W type) can use general oil, with V100、V150 viscosity grade oil.

2、Rotary vacuum pump (2 X type) selected V68、V100 viscosity grade oil.

3、Straight (high speed) rotary vane vacuum pump (type 2 XZ) V46、V68 viscosity grade oil.

4、Slide valve vacuum pump (H type) V68、V100 viscosity grade oil.

5、Roots vacuum pump (mechanical booster pump) gear transmission system lubrication, can choose V32、V46 vacuum pump oil.