COMSTAR 45-106 Polyol Ester Oil Hmc Hfc Hfo Corrosion 024924451069 Hfc/hfo Protect

( Brand: Comstar ), ( Manufacturer Part Number: 45-106 ), ( Part Type: Oil ), ( Package Quantity: Pack Of 1 ), ( Country Of Origin: United States ), ( UPC: 024924451069 )

Review COMSTAR Polyol Ester Oil Hmc Gal Hfc/hfo Systems Rust And Corrosion Protect

**ComStar 45-106 Polyol Ester Oil (HMC Gal for HFC/HFO Corrosion Protection)** is a high-performance, synthetic lubricant engineered specifically for advanced refrigeration and air conditioning systems utilizing hydrofluorocarbon (HFC) and hydrofluoroolefin (HFO) refrigerants. This premium polyol ester-based oil is meticulously formulated to deliver exceptional thermal stability, oxidation resistance, and corrosion protection, ensuring reliable performance even under the most demanding operating conditions. With a kinematic viscosity of 45 cSt at 40 C and a pour point as low as -40 C, ComStar 45-106 excels in both low-temperature applications and high-temperature environments, making it an ideal choice for commercial refrigeration, supermarket systems, and industrial chillers where efficiency and longevity are critical. Its unique molecular structure provides superior miscibility with HFC/HFO refrigerants, preventing phase separation and maintaining optimal lubrication properties across a wide temperature range. Beyond its lubricating capabilities, this oil incorporates advanced corrosion inhibitors that safeguard critical system components, including copper, aluminum, and stainless steel, from degradation caused by moisture, refrigerant breakdown, and chemical reactions. Whether used in cascade systems, heat pumps, or high-pressure applications, ComStar 45-106 ensures minimal wear, extended equipment lifespan, and enhanced energy efficiency, making it a trusted solution for modern refrigeration technologies. Its non-toxic, environmentally friendly formulation also aligns with global sustainability standards, offering peace of mind for operators while maintaining peak performance.

**Pros and Cons of Buying Comstar 45-106 Polyol Ester Oil (HMC Gal for HFC/HFO Corrosion Protection)**

### **Pros**

1. **High Thermal Stability** Polyol ester oils are known for their excellent thermal stability, making them suitable for high-temperature applications, including HFC/HFO refrigeration systems. This reduces the risk of oil degradation and extends equipment lifespan.

2. **Compatibility with HFC/HFO Refrigerants** This oil is specifically formulated to work with HFC (e.g., R-134a, R-410A) and HFO (e.g., R-1234yf, R-32) refrigerants, which are increasingly used in modern HVAC and refrigeration systems. Proper lubrication prevents corrosion and ensures efficient system performance.

3. **Corrosion Protection** The oil contains additives that provide galvanic corrosion protection for metals commonly found in refrigeration systems (e.g., aluminum, copper, steel). This helps prevent premature wear and failure of components.

4. **Low Volatility** Polyol ester oils have lower volatility compared to mineral or alkylbenzene oils, reducing oil loss due to evaporation, which is particularly beneficial in sealed systems.

5. **Environmentally Friendly** While not biodegradable, polyol esters are generally considered less harmful than some traditional refrigeration oils, aligning with modern sustainability trends in refrigeration technology.

6. **Stability in Moisture** These oils tend to resist hydrolysis better than some other synthetic oils, which can be advantageous in systems where moisture ingress is a concern.

7. **Compatibility with Seals and Materials** Polyol ester oils are often compatible with elastomers and plastics used in refrigeration systems, reducing the risk of seal degradation.

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### **Cons**

1. **Higher Cost** Polyol ester oils are typically more expensive than mineral or alkylbenzene oils. The premium price may be a barrier for budget-conscious buyers, especially in large-scale applications.

2. **Limited Compatibility with Some Refrigerants** While it works well with HFC/HFO refrigerants, it may not be suitable for older systems using CFCs or HCFCs (e.g., R-12, R-22), which require different oil types. Always verify compatibility before use.

3. **Potential for Foaming** Under certain conditions (e.g., high-speed compressors or rapid pressure changes), polyol ester oils can foam, which may affect compressor performance and efficiency.

4. **Sensitivity to Contaminants** These oils can be sensitive to water, acids, or particulate contamination, which may accelerate degradation if not properly filtered or maintained. Regular oil analysis is recommended.

5. **Viscosity Sensitivity to Temperature** While polyol esters maintain viscosity well under high temperatures, their viscosity can drop significantly at low temperatures, potentially affecting lubrication in cold environments. This may require careful system design or supplementary heating.

6. **Limited Availability** Compared to more common oils (e.g., POE for R-134a), polyol ester oils may be harder to source, especially in regions with fewer specialized suppliers. Lead times could be longer.

7. **Potential for Additive Depletion** Over time, corrosion inhibitors and other additives may degrade, necessitating oil changes or top-ups with fresh oil to maintain protection.

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### **Conclusion**

Comstar 45-106 polyol ester oil is a high-performance lubricant well-suited for modern HFC/HFO-based refrigeration and HVAC systems. Its thermal stability, corrosion protection, and compatibility with newer refrigerants make it a reliable choice for applications where traditional oils may fall short. However, its higher cost, potential foaming risks, and sensitivity to contaminants require careful consideration. For systems operating under extreme conditions (e.g., high temperatures, high-speed compressors, or harsh environments), the benefits often outweigh the drawbacks. Conversely, for cost-sensitive or simpler applications, alternatives like POE or alkylbenzene oils might be more practical.

### **Recommendation**

- You are working with **HFC/HFO refrigerants** (e.g., R-134a, R-410A, R-32, R-1234yf).

- Your system operates at **high temperatures** or requires **strong corrosion protection**.

- You prioritize **long-term reliability** and are willing to invest in a premium oil.

- The system includes **aluminum or mixed-metal components**, where galvanic corrosion is a risk.

- Your budget is **strictly limited**, and cost-effective options like POE or alkylbenzene oils are compatible with your refrigerant.

- Your system operates in **extremely cold environments**, where viscosity concerns may arise.

- You lack **proper filtration or maintenance protocols** to handle the oil s sensitivity to contaminants.

- The system uses **older refrigerants (CFC/HCFC)**, which require different oil types.

**Final Suggestion:** If purchasing, ensure the oil is **fresh, properly stored**, and compatible with all system materials. Conduct **regular oil analysis** to monitor degradation and top up or replace as needed. Consult the manufacturer s guidelines and a refrigeration specialist to confirm the best fit for your specific application.

Details:

With advanced friction modifiers, anti-wear protection, and enhanced miscibility, this lubricant ensures smooth operation longer compressor life. LONG SERVICE LIFE: designed for extended fluid life, this anti-wear lubricant maintains stability in both high and low temperatures, reducing maintenance costs. Our Polyol Ester Oil offers unmatched performance in refrigeration applications. Application: HFC HFO Refrigerants, R22 Retrofitting.

Specially designed for HFC and HFO refrigerants, this lubricant offers superior protection, exceptional miscibility, long-lasting performance in commercial residential systems. ANTI-WEAR PROTECTION: Advanced friction modifiers and anti-wear additives provide superior protection, reducing compressor wear extending equipment life. ADVANCED REFRIGERANT COMPATIBILITY: Formulated for use with HFC and HFO refrigerants, ensuring optimal performance protection in modern refrigeration systems. RUST CORROSION PREVENTION: Protects your refrigeration system from rust, corrosion, and deposit buildup, ensuring smooth, efficient operation.

Protect your system from wear, rust, and corrosion while improving efficiency reducing maintenance costs. ENHANCED MISCIBILITY: Perfect for retrofitting R22 systems with refrigerant blends containing hydrocarbons improved miscibility and seamless oil return.

part #: 45106 price

• $664.74

specifications automobilefluids:

• brand: Comstar
• mpn: 45-106
• part type: Oil
• package quantity: Pack Of 1
• country of origin: United States
• upc: 024924451069

offer automobilefluids:

• availability: In Stock
• started: March 11, 2026
• sold: 0
• options: Ship-to-home

payments automobilefluids:

• credit card: Mastercard
• wallet: Google-pay
• other

shipping automobilefluids:

• service: USPS Ground Advantage
• class: Standard
• carrier: USPS
• type: Calculated
• transit: 9-13 Days
• cost: $106.73

general automobilefluids:

• condition: New
• Automotive Tools Supplies > Fluids Chemicals > Motor Oil

returns automobilefluids:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

seller automobilefluids:

• city: College Point, New York
• # reviews: 64
• rating: 100.0%

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