Yeah, the problem is that the engine gets so hot that the oil that does seep out will eventually bake right on the outside surface. In some situations and turn that ugly yellow color. I believe it will also do that inside the cylinder head.

And, of course, as Alan said, if you can find it, fuel with synthetic oil does the trick, won't burn on the sides like the castor oil mix does.

There is a big chemical plant across from the Raytheon plant in Harlow, a pharmaceutical plant, can't remember the name off hand, but I pass it every day on the way to the plant from the hotel when I'm out that way. My girlfriend, Julie, and I have taken a cruise out of Southampton on P&O. Very VERY nice!! Stayed at the DeVere right by the docks for a couple days after the cruise.

DS