What Is Polyolester Oil? (Explained)

POE or Polyolester oil is used in direct expansion (DX) refrigerants such as R410A systems. Polyolester oil is added to the R410 refrigerant charge and circulates with the refrigerant.

Besides this, these oils typically have a lower viscosity index than polyethylene glycol (PAG) or poly-alpha-olefin (PAO) oils. And it needs a higher viscosity grade to achieve a specific kinematic viscosity at high oil temperatures. However, please read attentively to know the valuable properties of polyolester oil and what polyolester oil is.

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What Is Polyolester Oil?

Polyolester oil (POE oil) is a synthetic oil used in refrigeration compressors with refrigerants R-134a, R-410A, and R-12. HFC-134a with POE oil as a lubricant replaces CFC-12 with mineral oil.

This is also a wax-free oil recommended for use with chlorine-free HFC systems. The reason is that they offer proper lubrication and durability and are mixed with your HFC refrigerants.

They match the lubricity characteristics of mineral oils used with CFCs and HFCs. In the market, these PAO oils are compatible with most of lubricants. Plus, the oil viscosity reduces with temperature. Additionally, these oils’ dispersion behavior has been studied extensively. It is an excellent addition to motor oil.


Since the refrigeration and AC tool’s gasses are changed, you should change the types of oils. Generally, POE oils easily liquefy most of the extra mineral oils they can replace.

Thus you can avoid clogging the system with old oil residues. Subsequently, you can exclusively use this polyolester oil in jet engines and films.

Polyolester oil 32:

Polyolester oil is a premium synthetic lubricant ideal for HCFC, HFC, and CFC refrigerant applications. And the viscosity grades are 32 and 68, which are available. Undoubtedly, you can use these POE oils in various low-temperature applications. Most importantly, this polyolester oil is compatible with many common refrigerants like R404A, R134a, R452a, and R513a.

Moreover, this 32 oil suits high-performance refrigerator compressors and sensitive cooling devices. Yet, this refrigeration oil also provides high protection in different systems. Plus, this oil offers low-temperature fluidity and exceptional lubricity to keep your maintenance system at a minimum level.

Polyolester Refrigeration Oil:

Refrigeration Polyolester oil provides unmatched performance in HFC refrigeration applications. Its advanced formulation delivers extraordinary safety for HFC refrigeration systems. After using this oil, you can get exceptional chemical and thermal stability and long life.

In addition, this refrigeration oil uses advanced friction modifiers and antiwear additives combination proprietary. And this combination generates an additional protective layer and lubrication that decreases wear and friction. As a result, the life of compressor performance is increased and saves energy.

Specially it’s designed for use with HFC refrigerants and mixed with CFC and HCFC refrigerants. Our POE oils have outstanding oxidative, thermal, and hydrolytic strength.

Polyolester Oil 68:

Accordingly, you can blend this polyolester 68 oil for all HFC refrigerants. Likewise, it’s compatible with the R-22. You can charge NL POE to R-22 systems running on R-22 in preparation for an HFC retrofit.

Hence, this Polyolester is also compatible with mineral oil and alkylbenzenes. Plus, it provides many opportunities when retrofitting older applications to HFCs. NL POEs utilize many industry formulations approved by most OEMs.

POE Compressor Oil:

POE compressor oil also is a synthetic oil used in compressors, and it’s compatible with R-134a, R-410A, and R-12 refrigerants.  Synthetic polyester (POE) refrigeration lubricants impart optimum performance, wear safety, and longer service life. So, you can use it in today’s energy-efficient and HFC-based refrigeration and AC systems.

Furthermore, these products have outstanding lubricity, thermal strength, and load-carrying capacity. It is also an excellent option for HFC system service and retrofitting from HFC to HCFC-based refrigerant blends. Though these oils don’t contain extra antiwear additives, they can’t leave deposits. With alkylbenzene lubricants and existing mineral oil, these oils are compatible.

FAQ (Frequently Asked Questions):

Q. What is polyolester oil used for?

You can use this polyolester oil in refrigeration systems that contain HFC and HFO refrigerants.

Q. What Is POE oil Used for?

Primarily this synthetic oil is great oil for refrigeration systems using HFC refrigerants. It’s also perfect for CFC, HCFC refrigerants, and rated CO2 systems.

Q. How is polyolester oil made?

Polyol Esters (POE) is made by reacting an alcohol with an organic acid to form a single molecule. To give the pure polyolester, the making process involves an organic acid reaction with extra alcohol.

Q. Is POE oil polyolester?

Polyolester oil means POE oil, a synthetic oil formulated for refrigeration compressors.

Final Word:

In summary, Polyolester or POE oil can perform well over a broad temperature range. Since this oil is hygroscopic, it can absorb moisture. They are suitable solvents; you can easily dissolve the additional mineral oils. Still, at high temperatures, they can develop wear protection.

You can perform excellently with this oil in your AC and refrigeration compressors. Nonetheless, this article is essential for those who love to learn about Polyolester oil. We hope you can get accurate information about this POE oil from the guide. Thanks for reading.


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.