TSI Supercool PAG Compressor Oil P46-128D 46 Viscosity Gallon — Synthetic PAG for R134a with UV Dye, Anti-Wear Additives

TSI Supercool P46-128D is a synthetic PAG compressor oil with 46 viscosity formulated for R134a A/C systems and includes UV dye for leak detection.

This high-performance PAG (polyalkylene glycol) lubricant is engineered to protect automotive and light-truck air conditioning compressors operating with R134a refrigerant. Its 46 viscosity balances film strength and flow to maintain lubrication across typical operating temperatures, while built-in UV dye helps technicians spot leaks quickly. Additives such as anti-wear agents, friction modifiers, and antioxidants work together to reduce mechanical wear, limit deposit formation, and support OEM-level performance.

How does this oil improve compressor longevity?

The P46 formulation contains anti-wear chemistry that forms a protective film on moving parts and friction modifiers that reduce internal drag. This combination lowers metal-on-metal contact and heat buildup, helping compressors run cooler and last longer under normal operating conditions.

• Anti-wear agents reduce bearing and vane wear
• Friction modifiers improve efficiency and lower internal stress
• Stable viscosity helps maintain a lubricating film at operating temperatures

Will it work with my R134a A/C system?

Yes — the P46-128D is formulated specifically for systems charged with R134a refrigerant and meets OEM performance specifications for that refrigerant family. It’s intended for systems designed for PAG oil; do not mix with mineral or ester-based oils without proper flushing.

• Compatible with R134a-equipped automotive A/C compressors
• Meets OEM performance guidelines for PAG lubricants
• Contains UV dye for easier leak detection during service

How does the UV dye help during maintenance?

The integrated UV tracer disperses through the system with the oil, making refrigerant leaks visible under a UV lamp. This simplifies diagnostics by pinpointing the leak source so technicians can address seals, hoses, or fittings swiftly and accurately.

• UV dye highlights leaks under blacklight inspection
• Reduces time spent searching for elusive leaks
• Works while oil circulates within the system for comprehensive coverage

What performance protections do the antioxidants provide?

Antioxidants in the formulation slow the chemical breakdown of the oil under heat and oxygen exposure, reducing sludge and deposit formation that can impair flow and sealing. That helps keep the system cleaner and preserves efficiency over time.

• Limits sludge and varnish formation on internal surfaces
• Maintains oil fluidity and filterability under operating temperatures
• Supports longer intervals between major maintenance events

Who is this for: TSI Supercool P46-128D PAG Oil 46 Viscosity with UV Dye is aimed at professional technicians, independent shops, and knowledgeable DIYers servicing R134a automotive and light-truck A/C systems that require PAG lubricants. It’s ideal when you need a balance of protective performance, OEM compatibility, and convenient leak-detection capability. Always follow vehicle manufacturer guidelines and perform a complete oil flush if converting between different lubricant chemistries.