a/c system fluid proportions

[joecool]

hello. How do you know if the a/c refridgerants and pag oil are in proportion? Also, how would you know if you filled up the system with enough oil or too much? Pag Oil 46 viscosity, 134a refridgerant

[Silver 99 Camaro]

You can't know for sure unless you flush the entire system. However, when you replace components, there are specifications for how much PAG to add to each component. Also, don't worry if you add too much oil. If you add a little too much the result is that the AC system is not as efficient so it won't blow quite as cold, but it will not harm anything.