Running ES12A on a 1987 300D turbo.

1. What is the system capacity? I have 1 book that says 36 oz, and one that says 48 oz. -- edit, answer is 36 oz.
2. Is it normal for low side to run 60 psi and high side to run 200 psi at idle ?
3. Should compressor cycle on/off on this car? Mine stays on whole time.
4. Any idea what white milky substance in site glass indicates on a 36 oz charge of ES12A ?

Im not getting very good cooling from AC lately. I evac the system to 30 in HG and it held. Recharged --edit -- 18 oz ES12A. Site glass was and still has milky white foam. Gets kind of cold on hwy, blows warm at idle. Any help appreciated.

__________________
Paul
Benz-less
I need an SDL !