C
careyo63
Guest
Black oil is normal for desiel engines.Thick black sludge looking is a good sign of poor maintenance.I think I would be reluctant to put any harsh chemicals in it and just change the oil and filter after let say 25hrs. and see what it looks like.Also the oil pan and valve cover can be easily removed and cleaned up by hand and then you can be able to see if you might have a problem. I change my oil and filter every 100 hrs.also did you clean your Hyd. screen? I would though flush the cooling system, as you know it gets pretty warm in the summer down here.