Lawnmowers, chainsaw, snowblower, 4-wheeler......Well, they had oil in them when I got them.....They still do as far as I know.
that made me laugh
I have a 11 year old Toro with a Kohler engine. Change the oil once a year and grease whatever fitting is has on pulleys and drives.
Never had a thing go wrong with it yet except for a spring rusting.
Quads/Motorcycle, etc., are all once a year with conventional because of the internal clutches and what not