So this is something I’ve wondered about for years. Presuming there is no contamination, leaks, or other problems, would any refrigerants degrade in any way after many years of use? I would think so since just about all fluids in closed systems seem to degrade in some way, but then again, I’ve never heard of doing a “refrigerant change”. And if the refrigerant doesn’t degrade, I presume the compressor lubricant would degrade, right? Thanks.