Polyalkylene Glycol (PAG) oils are often used in air conditioning systems, especially in vehicles. Over time, several myths have developed around them, leading to confusion. PAG Lubricants play a key role in keeping A/C systems running smoothly.
Despite their benefits, many people still believe things about them that simply aren’t true.
PAG Oils Are the Same as Other Lubricants:
One common belief is that PAG oils are just like other types of lubricants. This isn’t true. PAG oils are specially made for use in systems that work under high pressure and temperature, such as A/C units. They are designed to mix well with refrigerants like R-134a, which many standard oils cannot do. Using the wrong oil can cause poor cooling, or even damage the system.
PAG Oils Can Be Mixed Freely:
Another myth is that you can mix PAG oils with other oils or types of PAG. This can cause serious problems. PAG oils come in different viscosities and chemical compositions. Mixing them can lead to poor performance or even system failure. It’s always best to use the same type and grade that the system was originally filled with.
PAG Oils Are Harmful to the Environment:
Some people think PAG oils are dangerous for the environment. In reality, PAG oils are less harmful than many alternatives when handled correctly. They don’t contain chlorine or other substances that are known to harm the ozone layer. Proper disposal and handling are important, just like with any chemical product.
You Can Reuse PAG Oils After Servicing:
After servicing an A/C system, some believe the oil can be reused. However, once PAG oil is exposed to air or moisture, it can absorb water and become less effective. Moisture can react with the oil and cause it to break down. This can lead to rust or corrosion inside the system, reducing the overall performance.
PAG Oils Don’t Need Special Handling:
It’s often assumed that PAG oils can be handled like any other oil. However, they are hygroscopic, meaning they attract moisture from the air. Even a small amount of water can lower their effectiveness. That’s why these oils are stored in sealed containers and used carefully during service.
Understanding the truth about PAG oils helps people take better care of their systems. When used properly, they help A/C units last longer and work better. Clearing up these myths is a simple way to avoid mistakes and keep things running cool.
