R-12 is a refrigerant that has not been used in vehicles in the United States since 1994. Today’s cars use R-134a and R-1234yf refrigerant, which has a less damaging environmental impact than R-12. Summary To recap, the coolant is responsible for heating a car’s interior and cooling...
gas and then back again based upon the pressure applied to it. These phase changes cause the refrigerant to absorb and release heat throughout the cycle. Today automobiles use either R-134a (which is being phased out) or R-1234yf refrigerants. Refrigerant has a very, very low boiling point...
Pag oil or polyalkylene glycol oil is a man-made lubricant that is useful in both R134a systems and the latest R1234yf systems, while ester oil is a synthetic base oil that is chemically synthesized. The key difference between Pag oil and ester oil is that Pag oil comes in different visc...