The oil become black in 20 minutes running in the first time of operation.

Normally after 800 hours, oil become black, this case only be in short time. Kindly ask your advise for the cause of the above problem?
Compressor type:
Reciprocating / piston
Compressor model:
SGC 700
Nguyen Minh
Project Engineer at JGC

Are you sure you used the correct kind of oil?

Did the compressor run at very high temperatures?

Can you measure the temperature of the oil after running? I'm just guessing here, maybe something is getting hot which causes the oil to turn black.
Owner of

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