It depends on the oil level. Turning an R4 ports side down will remove some oil. there is also oil in the dryer, condenser, etc. When I rebuilt my A/C system, I flushed it with Methanol, and replaced the expansion valve, drier, pressure switches and the compressor. Also replaced all the O-rings and used the "Baby snot" o-ring lube, and BG Fridgi-quite oil. That was 10 years ago.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D