How is the AC compressor lubricated in an R-134a system?
A) Uses a sump to hold 3 to 5 oz. of refrigerant oil
B) The refrigerant oil mixes with the refrigerant
C) The oil moves through the system simply with the movement of the refrigerant
D) Most compressors are a sealed unit with their own oil
C) The oil moves through the system simply with the movement of the refrigerant
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