Yes, the motor has an oil filter. I just ordered some Baldwin B-7221 filters for mine yesterday and I bought a quart of Kohler 10W-30 at the dealer's shop who sold me the mower. I ran the first tank of gas through it (about one hour), drained the oil and topped it off with Rotella 15W-40. I haven't changed the filter yet. I'll run this tank through it and change the oil filter. I figure it should be broken in after 2 hours of mowing grass.