PAG 100 R134a A/C Compressor Oil – 8 oz, ISO VG 100, Standard Domestic Systems

The HCPRO Performance PAG 100 is a standard-viscosity polyalkylene glycol (PAG) compressor oil for R-134a A/C — the grade most domestic vehicle compressors specify.

Key features

• ISO VG 100 PAG — the most common PAG grade on a service truck
• Domestic fit — GM, Ford, Chrysler and many imports that spec PAG 100
• Thermal stability — acid-resistant synthetic, 450°F flash point, -36°F pour point
• Tested to ASTM and ANSI-ASHRAE 97-1989 — lubricant performance standards
• 8 oz / 237 mL — single, 6-pack or 12-pack

Who this oil is for

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

When to use it

During R-134a A/C compressor service when the OEM calls for ISO VG 100. Full compressor refill: 4–8 oz per OEM spec. Top-off after refrigerant recharge: 1–2 oz per circuit. Most domestic vehicle service manuals specify PAG 100 — always verify before injection.

Why PAG 100 vs PAG 46, PAG 150, or POE

PAG 100 is the standard mid-range viscosity for most R-134a domestic vehicles. PAG 46 is for lighter-duty imports; PAG 150 for heavy-duty trucks. POE is for modern R-1234yf, R-410A, and A2L refrigerant systems — not compatible with R-134a PAG systems without proper retrofit. For leak detection in one step, use our PAG 100 UV variant.

Single 8 oz bottle, sealed leak-proof packaging, 2–3 year shelf life unopened. Manufactured in the USA to OEM compressor lubricant performance standards.