3G Mineral Refrigeration Oil – ISO VG 32 (SUS 150), Wax-Free, R22/R502, Gallon

The HCPRO Performance 3G is a refinery-grade mineral refrigeration oil, ISO VG 32 / SUS 150 — the right chemistry for the millions of R-22, R-502 and CFC/HCFC systems still running.

Key features

• ISO VG 32 / SUS 150 — lower viscosity for general HVAC and low-temperature commercial refrigeration
• Wax-free formulation — prevents floc in evaporators and expansion valves
• Legacy and hydrocarbon systems — R-22, R-502, CFC, HCFC, R-290, R-600a and ammonia
• Flash point ~430°F, pour point -40°F — clear to light amber
• All compressor types — reciprocating, rotary and hermetic

Who this oil is for

Refrigeration contractors servicing R-22 commercial equipment. Walk-in cooler and freezer service techs. Appliance repair techs working on R-600a household refrigerators and freezers. Commercial refrigeration techs servicing R-290 reach-in coolers, vending machines, and beverage display cases. HVAC techs servicing legacy R-22 residential equipment.

When to use it

During compressor refill on R-22, R-502, CFC, HCFC, or hydrocarbon (R-290, R-600a) systems. Use at OEM-specified change intervals during routine service. Critical for low-temperature refrigeration where wax-free formulation prevents floc buildup. Don't use during R-22 → R-410A retrofit — transition requires POE oil.

Why mineral vs PAG, POE, or 4G VG 68

Mineral 3G VG 32 for legacy R-22/R-502 systems and hydrocarbon refrigerants — chemically similar to hydrocarbons (R-290, R-600a) for full miscibility. 4G VG 68 for higher-pressure commercial. POE for modern HFC/A2L. PAG for R-134a automotive only. Using POE in R-22 systems can change oil return behavior; using PAG in refrigeration causes failure.

Available in quart and gallon sizes. Refinery-grade, non-hazardous, 3–5 year shelf life sealed. Manufactured in the USA to OEM compressor lubricant performance standards.