How can I filter used motor oil so that I can use it to lubricate other tools like chain saw?
Seems that I recall service stations doing that years ago and selling used oil. With the price of petroleum products these days, I'd like to save a buck here and there and truly recycle.
Nasty things happen to motor oil when it's been sloshing around in your engine for several thousand miles. The most significant problem is the accumulation of alkyl benzene compounds from the cylinder blow-by. Alkyl benzines are known carcinogens, and





