Quote:
Originally Posted by dhoward
M... Pouring used oil back on the ground allows it to slowly penetrate, back to where it belongs, ...
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I hope that was a joke.
Pouring used motor oil on the ground is illegal everywhere that I know of. And for good reasons.
Fresh motor oil is not too bad (do not use on salads tho). But used motor oil is full of toxic metals - which will never break down. It is also full of combustion by-products -- long chain and cyclic organic molecules, many of which are very toxic. They can persist for many years, perhaps decades.
Dumping it on the ground puts it into the groundwater and pollutes lakes, streams and rivers once it works it's way there. While it is in the ground water, it pollutes drinking water supplies in wells.
Spilling crude oil - even a heavy crude - is not as bad per pound as spilling used motor oil.