Before singing My Hearts Tonight in Irealnd, Andy Irvine wil often tell mad stories about his younger days with Sweenys Men. Among others things they had a van older than folk music itself. Now this is before pollution was invented, but the van burned so much oil that its smoke screen was famous around Clare and Galway. Not having much money, the boys solved the economical side of the problem by buying barrels of used oil. Irvines stories are as entertaining as his music.
....which reminds me of the Irish farmer when asked if his car used oil replied "well she might, if she got it"