Quote:
Originally Posted by olds45512
Back when I mowed with my 108 I could go all summer and the oil was just as clean at the end of summer as it was when I put it in. I noticed when I checked to oil in the 1211 the other day that the oil is pretty black, this oil only has about 3hrs on it. Just for piece of mind I'm going to change it before I mow again but was curious why it would be getting black so fast? The only thing I can figure is the engine wasn't taken care of very well and has some sludge in it. It doesn't burn a drop of oil.
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Either a dirty crankcase, or blow by on the rings. Either will cause it.