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polyalkylene glycol (PAG-46)
Price range: $5.00 through $2,750.00
Description
PAG Oil 46 is a polyalkylene glycol (PAG) lubricant used in automotive A/C systems, and the “46” refers to its viscosity grade—meaning it’s a medium‑viscosity oil suitable for many R134a compressors. It’s one of the most commonly specified oils for modern car air‑conditioning systems.
What PAG 46 Is
- PAG 46 = Polyalkylene Glycol oil, viscosity grade 46. The number indicates how thick the oil is; higher numbers mean thicker oil.
- Used primarily in automotive A/C compressors, especially systems using R134a refrigerant.
- Provides lubrication, reduces friction, and helps with heat transfer inside the A/C system.
When PAG 46 Is Used
- Commonly specified for tighter‑tolerance compressors that need a lighter oil.
- Often recommended by OEMs for many passenger vehicles.
- Should only be used if your vehicle manufacturer or compressor label calls for PAG 46.
PAG 46 vs Other PAG Oils
| Oil Type | Viscosity | Typical Use | Notes |
| PAG 46 | Medium-light | Many R134a systems | Most common; good flow and lubrication balance. |
| PAG 100 | Medium | Larger compressors | Thicker; used in some trucks/SUVs. |
| PAG 150 | Thick | Heavy‑duty compressors | For systems needing a thicker oil film. |
Important Notes
- Never mix PAG oils of different viscosities—can cause chemical incompatibility and seal damage.
- Always follow vehicle‑specific instructions to avoid compressor failure or warranty issues.
Additional information
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Pag-46 | 8.oz, 16.oz, 1. Gallon, 5. Gallon, 55. Gallon, 275 Gallon |


