Vacuum pump oil does a lot of help with the operation of the vacuum pumps:
Seal: Prevents the atmosphere from entering the exhaust valve.
Lubrication: Reduces wear between relatively moving parts.
Cooling: The pump oil will loop inside the pump and the fuel tank which has the effect of cooling.
Carrying: Carrying dust or other particles generated by abrasion into the oil to reduce wear and tear.
Protection: Form a protective film to prevent water and chemical vapor condensation from corroding inside the pump.
Recommendations: If the vacuum pump is running daily, it is recommended to change the pump oil every three months.