TSI Supercool Mineral Oil for R12 A/C Compressors — SAE 110 (525 VIS) 32 oz Bottle, High-Viscosity Lubricant

TSI Supercool MO-500-GM-32 is a super-premium mineral oil formulated for R12 automotive A/C systems, offering SAE 110 (525 VIS) viscosity in a 32 oz bottle.

This lubricant is designed specifically for older vehicle air-conditioning systems that use R12 refrigerant and require a high-viscosity mineral oil. The product provides stable lubrication properties tuned to the demands of R12 compressors, helping maintain proper oil film and component protection. It’s a universal-fit mineral oil intended for direct replacement where OEM or rebuild specifications call for a 525 SAE viscosity grade.

What makes this mineral oil suitable for R12 A/C compressors?

The MO-500-GM-32 is blended to meet the viscosity and base-oil characteristics expected by systems originally designed for R12. Its high SAE 110 viscosity helps maintain oil film on bearings and sliding parts at typical operating temperatures, which is important in older compressor designs.

• Spec: SAE 110, 525 VIS for consistent flow and film strength.
• Base: mineral oil formulation compatible with R12 lubricant requirements.
• Application: intended for compressors and components in R12-equipped systems.

How do I use this 32 oz bottle when servicing an A/C unit?

The 32 oz container is sized to supply oil for individual compressor fills or top-offs during A/C service and rebuilds. Always follow compressor manufacturer guidelines for charge volume and exact oil amounts, and ensure the system is evacuated and leak-checked before charging refrigerant.

• Measure oil volume required per service manual or compressor plate.
• Drain old oil and inspect for contaminants before adding new oil.
• Pour with a clean funnel or pump to avoid introducing debris.

Will this oil mix with other A/C lubricants or modern refrigerants?

This mineral oil is formulated for systems that use R12 and is not recommended for direct mixing with synthetic PAG oils or for systems converted to modern refrigerants like R134a or R1234yf without proper flushing and compatibility checks. Mixing dissimilar lubricants can lead to poor lubrication and component problems.

• Compatible: systems still using mineral oil and R12 refrigerant.
• Not recommended: direct mixing with PAG or POE synthetics without a full system flush.
• Conversion: follow a professional conversion procedure if switching refrigerants.

How should I store and handle this mineral oil safely?

Store the bottle upright in a cool, dry place away from direct heat and ignition sources. Keep the container sealed to avoid contamination, and use proper disposal methods for any leftover or used oil in accordance with local regulations.

• Storage: reseal cap, keep between recommended temperature ranges.
• Handling: use gloves and clean tools to avoid contamination.
• Disposal: follow local hazardous-waste guidelines for used oil.

Who is this for: This product is aimed at automotive technicians, classic car restorers, and DIY mechanics maintaining original-equipment A/C systems that still operate with R12 refrigerant and require a high-viscosity mineral oil. It’s ideal when OEM or rebuilding specifications call for a 525 SAE (110 cSt) mineral oil and when compatibility with original compressor designs is important.