On Wed, 14 May 2008 00:26:11 +0200, Martin wrote:

Isn't burning old engine oil an offence? It releases stuff that can
cause cancer.

Grandma, old engine oil is full of all manner of nasties from "simple"
toxins to carcinogens. However there is burning as in on a bonfire (low
temp incomplete combustion) and burning as in a X300 (high temp, complete
or very much better combustion), very different.

--
Cheers
Dave.