HCUP8UV Universal PAG Oil with UV Dye – 8 oz, R134a A/C Leak Detection

The HCPRO Performance HCUP8UV is a universal PAG oil with built-in UV dye for R-134a A/C — it blends with PAG 46, 100 and 150, so it goes in when you don't know what's already in the compressor.

Key features

• Universal viscosity blend — ~46–100 cSt, mixes with any existing PAG grade
• Built-in UV dye — meets SAE J2297, glows under any UV light
• No dosing math — skip the separate dye injector
• R-134a systems — domestic and imported autos and light-duty trucks
• 8 oz / 237 mL — single, 6-pack or 12-pack

Who this oil is for

Auto A/C techs chasing intermittent R-134a leaks. Mobile mechanics doing recharges where systems lose charge between visits. Fleet techs servicing mixed inventories where OEM PAG spec isn't always known. Independent shops that want one universal bottle instead of three viscosities.

When to use it

Add during recharge to diagnose slow leaks you can't visually locate. Inject 1–2 oz per circuit for diagnostic; refer to OEM spec for full compressor replacement (4–8 oz typical). Run A/C 10–15 minutes, inspect with UV light (365–400 nm) — leaks glow fluorescent green-yellow at fittings and seals. 8 oz covers 4–8 diagnostic jobs.

Why universal UV PAG vs grade-specific PAG

One bottle covers any PAG 46/100/150 system — no need to stock three viscosities. Built-in dye eliminates separate injection. For a known OEM viscosity spec, use grade-specific PAG (46/100/150 UV); for unknown systems or universal top-off, this is the answer.

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