TSI Supercool P100 PAG 100 Viscosity Oil Plus U/V Dye - 6 Pack

In this review the TSI Supercool P100-8D PAG 100-Viscosity oil is examined for technicians and DIYers who service R134a A/C systems. The bottom line: it is a focused, high-performance PAG formulated to protect compressors and help find leaks with its built-in U/V dye. The review finds the oil most useful when topping off or rebuilding compressors where OEM compatibility and resistance to moisture matter most, and highlights its anti-wear and anti-oxidant chemistry as the single biggest reason a shop or serious hobbyist would choose it.

Key Features

• 100 Viscosity for R134a Systems: Matches systems specified for PAG 100 to ensure proper film thickness and compressor lubrication under operating temperatures.
• Anti-Wear Agents and Friction Modifiers: Reduce compressor wear rates to help extend compressor life and maintain A/C performance over time.
• Anti-Oxidants: Prevent sludge and deposit formation so that system efficiency is preserved and service intervals are less frequent.
• Contains U/V Dye: Built-in dye makes leak detection simple and fast when using a UV lamp, improving diagnostic speed in the shop.
• Excellent Resistance to Moisture: Helps protect internal components from hydrolysis and performance loss in humid environments.

Who It's For

The oil is best suited to automotive technicians, independent repair shops, and experienced DIYers who work on R134a A/C systems and need a factory-equivalent PAG 100 lubricant that is top-off compatible. Buyers who value leak detection capability and a lubricant formulated to meet OEM performance specifications will find this product particularly useful.

It is not aimed at systems using other refrigerants or viscosities, nor for casual users who require a single-ounce bottle for an emergency top-up; those customers should confirm system compatibility and consider single-unit sizes or a different viscosity grade designed for their refrigerant and compressor type.

Pros & Cons

Pros

• High PAG 100 viscosity provides correct lubrication for R134a compressors and helps maintain system efficiency.
• U/V dye is very reactive under UV light, making leak detection fast and reliable.
• Anti-wear and anti-oxidant chemistry reduces compressor wear and resists sludge formation, improving longevity.
• Sold as an 8 oz bottle in a 6 pack, offering good value for frequent service use.

Cons

• Available only in 8 oz bottles per pack, which may be more than needed for one-off repairs or small jobs.
• Intended specifically for R134a systems; using it in incompatible systems is not advised.

Specifications

Product	TSI Supercool P100-8D PAG 100-Viscosity Oil Plus U/V Dye
Viscosity	PAG 100
Volume	8 oz per bottle, case of 6
Refrigerant Compatibility	R134a systems
Key Additives	Anti-wear agents, friction modifiers, anti-oxidants, U/V dye
Moisture Resistance	Provides excellent resistance to moisture

Our Verdict

The TSI Supercool P100 PAG 100 oil is a practical choice for professionals and serious DIYers working on R134a systems because it combines correct PAG 100 viscosity with effective anti-wear and anti-oxidant chemistry plus a reactive U/V dye. It offers solid value in a 6-pack for shops that perform regular service and is recommended when OEM compatibility and reliable leak detection are priorities.

Frequently Asked Questions

Is this oil compatible with R134a compressors?
Yes. It is formulated specifically for R134a systems and is a PAG 100 viscosity recommended for compressors that call for that grade.

Can the built-in dye be used for leak detection?
Yes. The U/V dye in the oil is designed to be highly reactive under UV light and assists in quickly locating leaks.

Is this product safe to mix with OEM equivalents?
TSI states the lubricants are top-off compatible with corresponding OEM and aftermarket equivalents, but technicians should confirm compatibility with the specific compressor manufacturer.