While seemingly just about a third of our Tech Support calls are about which oil to use, no one ever asks how to dispose of the old oil legally and properly, i.e. not in a dumpster. So, Dr. Diesel will tread where few men dare and offer solutions:

1. Make deck stain. Mix the old oil 70/30 with linseed oil and you will have a deck stain the local Junior League women will envy.
2. Add it in small quantities to your home heating oil tank.
3. Take it to an equipment repair garage that burns Ðwaste oil¼ to heat their shop.
4. Give it to your neighbor to lubricate the leaf springs and preserve the wood deck of his stake body trucks.
5. Where all else fails, bring it back to the guy who sold you the new oil. In most states he is obligated to accept it.