Not an wholesome idea at all . 1) pencil leads are a poor substitute for graphite , it has a lots of clay in it sometimes exceeding 50% of the volume depending on the hardness grade of the pencil 2) even in engines that has no replaceable filter , there are strainers and centrifugal filters which are very much likely to get overloaded and jam the oil pass-thru with ANY solid powder in this amount 3) thin oil galleys are likely to get jammed , usually with permanent effect requiring an complete overhaul . AND there are many other concerns too - like what you are going to do with slippery clutch plates
. In other words - Don't even think about it .


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