the one closest to the clutch pedal is the MASTER CYLINDER the one down by the clutch housing is the SLAVE
clean off the oil at the MASTER pull back the boot rubber operate the pedal in/out lots of times does oil reappear if yes MASTER seals HAVE failed
Find the SLAVE CYLINDER and check around the push rod if this area is dry ie NO OIL slave is OK
wirecutterman, February 2008