Merc 63
Member
Hi everyone it has been a little while since on site last. I own a 2004 Cat 303 cr excavator I use for personal use only. I do all of my own upkeep (oil changes. filter replacement etc...) Last year I notice that the oil was very black while check level and then did oil and filter change. I checked level after change and seen that the fresh oil I put in turn black also. This year changing my oil same thing, turned black with no run time on the machine. As stated I use this for my own personal use so I put very little hours on it (approx 50hrs or less). Not sure if this is common or should I be worried? I also own a Kubota 3130 tractor with same size engine ( 30hp) and the oil in that is as clean as the day I put it in the tractor after 100 hrs of run time. Any helpful hint will be appreciated.
Gary
Gary