Mercury - Quickstor Fuel Treatment and Stabilizer Fuel Care System Liquid Formula 8M0058692. Overview. There's a certain reassurance that comes from putting a machine away for the season and knowing it'll wake up months later without a fight. Whether it's your boat, your snowmobile, or the mower you rely on every summer, nothing's worse than stale fuel turning that first start into an unexpected project. Mercury Quickstor Fuel Treatment and Stabilizer gives you the confidence to store your equip