Pete in Holland, MI
>Have seen timber cutters use used motor oil, only one guy told me he dumps in a cheap equivlent of STP into a 3 gallon container to help make it a little tackier.

Seems motor oil isn't too bad on a saw. Just have to make sure there is enough.

Have used bar oil in mine most of the time, although discovered last winter while cutting some blanks, the thick gooey oil wasn't pumping very well, so I switched to some cheap 30W and that worked fine.