Products
Refrigeration Compressor Oils
The right refrigeration oil keeps compressors lubricated, returns cleanly through the system, and protects heat transfer efficiency. We supply the complete SUNISO line and help you match it to your refrigerant and equipment.
Match the Oil to the Refrigerant
Refrigerant type is the first question when choosing a compressor oil
| Refrigerant | Typical systems | Oil type | SUNISO product |
|---|---|---|---|
| HFC and HFO refrigerants | Modern commercial and industrial systems | Synthetic polyolester (POE) | SUNISO SL |
| Traditional CFC and HCFC refrigerants | Legacy and retrofit-ready equipment | Naphthenic mineral oil | SUNISO GS |
| Ammonia (R-717) | Industrial cold storage and food processing plants | Ammonia-specific refrigeration oil | SUNISO 4HT / 4SA |
Featured Products
SUNISO GS Mineral
Highly refined naphthenic mineral oils with excellent low-temperature fluidity and chemical stability.
- Low pour and floc points
- Stable with traditional refrigerants
- Multiple viscosity grades
SUNISO SL Synthetic
Synthetic POE lubricants for HFC and HFO refrigerants in commercial and industrial compressors.
- Refrigerant miscibility for oil return
- Thermal stability
- Supplied dry and sealed
SUNISO 4HT & 4SA Ammonia
Formulated for optimal performance of compressors using ammonia (R-717) refrigerant.
- Low carryover
- Resists oxidation and sludge
- Long service intervals
Refrigeration Oil Best Practices
- Use the oil type and viscosity grade your compressor manufacturer specifies
- Keep POE containers sealed; POE absorbs moisture from the air
- Never mix oil types without confirming compatibility
- Trend oil condition with routine oil analysis
- Flush thoroughly when converting refrigerants
Need help choosing?
Use the SUNISO product selector, or send us your compressor and refrigerant details and we will recommend the right grade.