Reg,

Thanks, vagaries of life,,, that's life. There, but for the grace of god go I, etc. so I do what I can, to help.

Yes, it might have been just the copper or who knows what combination. I had castor, 50 wght Avoil, a dash of WD40, mineral spirits, acetone etc. etc Gives credence to Bob's mention of five ingredients instead of two. I'm sure he has something important he's discovered and added to his fuel. In that case, he gets to keep it to himself. More power to that.

But copper in what form? Not sure I can wait five years for brass tubing to do it's magic,,, if that's what it was. And now, as you mention it, we touched on the copper thing a while back. Don't recall what came of that. There should be some chemical supply houses here that might be able to help.