I've searched the archives and just can't seem to come up with a tidy answer. This is our first opportunity to change the oil in our Cal 34 Yanmar 3GM30F engine. The owner's manual doesn't specify the type of oil to get, nor the oil filter to use. Should I also put same oil in the transmission? I am aware that I can order genuine Yanmar oil filters, but the common archive answer seems to be that a local Napa or Fram oil filter will suffice. If this is true, and what do I ask for when I go the auto parts store? Will I get the deer in the headlight look from the guys behind the counter when I say I want a filter for a marine engine?? Maybe someone with the same engine can answer these questions. As you can see I'm a novice, but really want to do my own oil changes.