The Important Guide To Vacuum Pump Oil

Vacuum pump oil is essential to keep your vacuum pump running. This oil lubricates your pump machine and collects moisture and pollutants from the evacuated systems. Usually, vacuum pump oil is a well-refined mineral oil. Due to its low vapor pressure and specific viscosity, it provides the best performance.

Nowadays, you can find various types of oils for your vacuum pump. You can get double- and triple-distilled, low-sulfur, silicone-based synthetic, and hydro-treated oils to clean your pump.

Additionally, all of these oils should be authentic from additives. However, this is the guide where we will discuss what vacuum pump oil is, its uses, and more. So please, keep reading.

Vacuum Pump Oil
vacuum pump

What is Vacuum Pump Oil?

Vacuum pump oil is a lubricating oil for vacuum components . Your pump oil must have anti-emulsification solid ability and viscosity grade to provide the best performance. Most importantly, according to your component manufacturer’s regulations, you should select your vacuum pump oil.

Moreover, this oil lubricates and cools the internal parts of the vacuum pump. Besides this, it helps to ensure smooth operation, prevent air damage, reduce wear, and protect against corrosion. Your vacuum pump oil must match the necessary oil types for your particular pump series and model.

How Often to Change Vacuum Pump Oil?

Remarkably, this is an excellent question, reminding you of periodic maintenance. With this maintenance, you can increase your equipment’s optimal performance and life.

In general, it’s recommended to change your vacuum pump oil every 500 hours. But this deadline will vary with some specific situations. To know more important information, please check out the following problems:

  • If you see any contamination on the glass.
  • If you notice any discoloration or any brown and foam color.
  • Also, if the pump fluid is present, any condensation and if you don’t use this pump for a long time.

The above situations aren’t only issues, but there are a few that you should be aware of. Ultimately, if you check your application, usage, and pump environment, it will help you to determine your frequency.

Vacuum Pump Oil Uses:

As we mentioned above, vacuum pump oil lubricates your vacuum pump. The vacuum pump’s job is to remove acids, moisture, and other pollutants from AC systems. So this oil may become a pollutant very quickly.

Once this oil is a pollutant in this way, the ability to remove moisture from the system will be reduced, and corrosion can happen. As a result, your system’s overall performance will reduce poorly evacuate your system. That’s why you should frequently change your vacuum pump oil to ensure optimal performance.

how often to change vacuum pump oil

Vacuum Pump Oil Substitutes:

Vacuum pump oil is exceptional. Although this oil is costly, you can’t replace it with engine oil.

Fortunately, as an alternative, you can use synthetic oil, diffusion pump oil, Rotary pump oil, flushing oil, and Autozone oil. You also can use some other vacuum pump oil as a substitute for vacuum pump oil.

Best Vacuum Pump Oil:

Depending on the used quality oil, the vacuum pump system performance. Low-quality oil may cause many issues, including wear and low vapor stress, and can reduce your Austen’s performance. It can even damage the seals of your machine.

For that, it’s essential to use the best vacuum pump oil for the system. Here is some best vacuum pump oil that you can use:

Robinair Vacuum Pump Oil

Robinair vacuum oil can maintain viscosity at high operating temperatures and handle challenging work. To maintain minimum moisture, this oil is carefully bottled and tested for quality. The resulting pump bearing, steam stress, and performance are better.

Because of its unique cold temperature features, your oil will pump in the cold. In particular, this feature can be essential to smoothly running your car in the winter season. Likewise, this oil can increase your system’s life by decreasing wear.

Laboratory tests report that Robinair oil exceeds the related crude in terms of thermal stability. And they are also making a very dependable choice for your requirements.

Autozone Vacuum Pump Oil

Autozone provides exceptionally high quality, hardly hydrotreated vacuum pump oil. The oil of Autozone is compatible to use in most manufacturers’ pumps. You know that vacuum pump oil must always be pure and clean from pollutants like acid, moisture, dirt, and steam.

The Autozone manufacturers recommend that all users change their oil after every use. It’s because if you can do that, you can improve the life of the vacuum pump. Remember that your pump performance depends on your pure and quality pump oil.

AC Vacuum Pump Oil

Ac Vacuum pump oil especially comes for use in deep vacuum pumps. Notably, if you use this oil, it can ensure proper performance and longer life. Therefore, this oil is hygroscopic and can absorb moisture from the air. After using the container, you should close it tightly.

In reality, from the manufacturer, you should refer to the AC unit’s owner’s manual if you want to take recommendations.

FAQ(Frequently Asked Questions):

Q. Can a vacuum pump leak oil?

Your vacuum pump is leaking oil because the seals are worn out. Immediately, it would help if you replaced these leaks. The new seals not only fix the leak issue but will also help the pump to maintain proper oil levels. Caused by reducing the necessity of frequent changes.

Q. Can a compressor oil be used for a vacuum pump?

Though it’s a bad idea, you can use the same lubricating oil. A compressor and a vacuum pump provide the same operation. The difference is the place of connection of tools.

Both have two ports, once a positive pressure and the second one a negative pressure port. For your vacuum, you should use a negative pressure port.

Check: Compressor Oil

Q. Is vacuum pump oil hydraulic oil?

All types of vacuum pump oil are not hydraulic oil. Only Repsol vacuum pump oil is a hydraulic oil recommended for vacuum pumps and wildly milking machine pumps. Exceptionally, this oil was developed in two viscosities. SAE10w and 30.

Final Word:

On the other hand, vacuum pump oil is a versatile ingredient inside your pump. Overall, it can indicate your pumping process and collect pollutants and moisture from your vacuum systems. Unfortunately, if this oil becomes a pollutant, it will make a sludge.

Eventually, it can ideally decrease your pump efficiency. Contaminated oil doesn’t lubricate your vacuum pump and rapidly wears your pumping component. Ergo, before contaminating your oil, you should replace it frequently.


I am Engr. Z Eusuf Lubricant Specialist, Mechanical Engineer & has been working with engine lubricants for a long time and knows what makes them work best. I can help you find the right oil for your needs, and I have tips on how to keep your engine running at its best.