Doug Miller wrote:

snip

The suspended solids in used engine oil are, for the most part, fine particles
of metal. The junk that collects on the bar during use is wood dust. Surely
you don't imagine that the two produce the same degree of wear on the chain
and bar.




Hey Doug,

Check this out as for the hardness of wood. Check out the third
picture down!! http://www.xmission.com/~tmathews/b29/e.html