Mercury - Quicksilver 25W-40 Oil Change Kit Oil Change Kit 25W-40 Mineral Oil 8M0169544. Overview. There is a certain relief that comes when you finish an oil change, wipe your hands, and know your Verado is truly ready for another long run. No guessing on oil weight, no mystery filter from a discount shelf, no scrambling for a drain plug washer at the last minute. This Mercury Marine part takes all of that out of the equation. The Quicksilver 25W-40 Oil Change Kit for Mercury L6 Verado outboard