Being I am new to the Yanmar tractors, I am wondering how much oil, I should expect it to use. When I say use, I also mean the loss from leaking front or rear seals, which should be little, but probably some. And also valve covers. Plus I'm sure these little engines, even though very good, must use a little oil. They are most 20 some years old and used. So you fellows that have had them for a long time, or at least for some time, how much oil would be a normal amount to expect it to use in like the 100 hour change that I understand I should change at? I know it would be hard to say exactly, as the way they are used and how they were used over seas, before we got them. But I would like to get a ball park figure, as I havn't seen anything on this anywhere on here. Thanks Charles