PAG 100 R134a A/C Oil with UV Dye – 8 oz, ISO VG 100, Leak Detection

The HCPRO Performance PAG 100 UV is a standard-viscosity PAG compressor oil with fluorescent leak-detection dye built in — lubricate and find the leak in one step on R-134a A/C.

Key features

• ISO VG 100 PAG — the standard grade for most domestic R-134a compressors
• Built-in UV dye — meets SAE J2297 leak-detection standards
• One-step service — no separate dye injection
• Domestic fit — GM, Ford, Chrysler and many imports that spec PAG 100
• 8 oz / 237 mL — single, 6-pack or 12-pack

Who this oil is for

Auto A/C techs servicing domestic vehicles where OEM specifies PAG 100 (most common viscosity grade). Mobile mechanics, fleet service, independent repair shops. The go-to bottle for the majority of R-134a service work.

When to use it

During R-134a recharge when the OEM calls for PAG 100 AND you want leak detection in one step. Diagnostic top-off: 1–2 oz per circuit. Full compressor replacement: 4–8 oz per OEM spec. Inspect with UV-A light (365–400 nm) — leaks glow fluorescent green-yellow at the leak point.

Why PAG 100 UV vs Universal UV or PAG 46/150 UV

PAG 100 is the most-specified viscosity grade across domestic R-134a vehicles — running PAG 46 in a PAG 100 system reduces film strength under load; running PAG 150 increases drag and reduces cooling efficiency. When the OEM calls for 100, use 100. Universal UV blend is the safe choice when system viscosity is unknown.

Single 8 oz bottle, moisture-sealed. Manufactured in the USA to OEM compressor lubricant performance standards.