I recently got a tractor. It is the old International Super A that has been in my wife's family since it was new 55 or 60 years ago. See the link for an earlier comment. They were going to sell it, but I thought it needed to stay in the family.

I finally got it home, and when I drained the oil and water out, they were mixed. The radiator had oil, water, and antifreeze and the crankcase was full of a brown mess that also included all three. That usually means a blown head gasket, so I guess I am going to have to learn to work on tractors. I put it into the garage today, so I can work on it this winter. Maybe next spring I can use it to till the garden.
Howard