Quote:
Originally Posted by Jack Shaft
Black is good,that means the carbon is being held in suspension basically the detergent is working.The proper name for the effect is entrainment,the oils ability to hold debris instead of depositing it on bearings
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I agree, but I still will not extend oil changes beyond 500 miles. I figure instead it collecting on surfaces, it continues to go through the bearings and other moving friction points.. The oil may be good, but the contaminants are still there. Like above oil is cheaper than replacing a motor with a shortened life. If I am wrong, prefer to error on the safe side.