Thanks for your thoughts Piotr. I have looked at the hoses pretty good, but it's always worth another look. It sure would be great if it were that simple wouldn't it.
The thing that's driving me nuts is the fact that a gallon went away fairly quickly and now it's going away very slowly again.
That leads to a soon and coming question. My experience in life has been that intermitten or very slowly reacting problems are often difficult to find. If I take it in and have it tested with some sort of very slow leak going on somewhere, will any mechanic be able to find the problem?