Hello to the group. I have a 1987 300SDL that was converted years ago by the previous owner from R-12 to R-134. The A/C has finally given up due to the compressor. The cooling capacity inside the car has always been marginal at best here in Houston with our sweltering heat and I want to switch back to the R-12 refrigerant (I was able to obtain some R-12). Anyway the car has the Denso compressor driven by a serpantine belt not the R-4 Delco. I plan on flushing the entire system and replacing the compressor. I ordered a new Denso compressor, expansion valve, dryer and mineral oil. My question has to do with the refrigerant oil capacity. I've looked on the forum here and it only addresses the R-4 Delco. I cannot find the system oil capacity for the Denso unit. I plan on draining the new compressor of all its oil and replacing it with mineral oil.

Also, how much oil do I put into the compressor itself once I am ready to mount the compressor onto the engine? And what about the remainder of the oil once I fill the compressor, place it in the high pressure side of the hose before the expansion valve?

I would appreciate your input.

Thanks

Herb