Refrigeration Lubricants
SUNISO®
World-Leading Refrigeration Lubricants
SUNISO is recognized globally and trusted by refrigeration equipment manufacturers and operators. Now managed by Petro-Canada Lubricants, the SUNISO line covers mineral, synthetic, and ammonia compressor oils for every type of refrigeration system.
Industries Served
Large industrial systems
Process cooling and large-scale plants
Industrial refrigeration
Cold storage, warehousing, and food processing
Commercial refrigeration
Supermarket racks, walk-ins, and display cases
White goods
Domestic refrigerators and freezers
SUNISO Product Lines
The right refrigeration oil for your compressor and refrigerant
SUNISO GS
Premium, highly refined naphthenic mineral refrigeration oils. A long-standing choice for compressors running traditional refrigerants, with excellent low-temperature fluidity and chemical stability.
- Highly refined naphthenic base
- Low pour and floc points
- Thermal and chemical stability
- Multiple viscosity grades
SUNISO SL
High-performance synthetic polyolester (POE) refrigeration lubricants formulated for modern HFC and HFO refrigerant systems in commercial and industrial equipment.
- POE synthetic base
- HFC and HFO refrigerant compatible
- Good miscibility and oil return
- Low moisture content when packaged
SUNISO 4HT
Formulated for optimal performance of compressors using ammonia refrigerant, helping maintain clean systems and dependable operation in industrial plants.
- Designed for R-717 ammonia
- Resists oxidation and sludge
- Low volatility, low carryover
- Industrial compressor duty
SUNISO 4SA
An ammonia refrigeration lubricant engineered for compressor reliability and long service life in large industrial refrigeration systems.
- Designed for R-717 ammonia
- Long service intervals
- Low-temperature performance
- Industrial compressor duty
Always confirm the compressor manufacturer's oil recommendation for your refrigerant. Compare refrigeration oils
Why SUNISO?
- World-leading refrigeration lubricant brand trusted by OEMs and end users
- Now managed by Petro-Canada Lubricants, part of HF Sinclair
- Mineral, synthetic, and ammonia-specific product families
- Supports compressor reliability and efficient heat transfer
- Local supply and technical support from Leahy-Wolf
Not sure which grade you need?
Tell us your compressor make and model, refrigerant, and evaporator temperature. Our team will match the right SUNISO product and viscosity grade, and can set up oil analysis to keep your system healthy.