Mercury - Sterndrive and Inboard V6 Oil Change Kit 25W-40 Marine Oil Service 8M0182225. Overview. There's something reassuring about doing your own oil change-fresh oil going in, old oil draining out, and that quiet confidence that your engine is ready for the next long run. The Mercury 25W-40 Sterndrive and Inboard V6 Oil Change Kit 8M0182225 brings that feeling full circle. It gives you everything you need in one tidy box, so you're not chasing down filters, guessing oil weights, or wondering