Mercury - Quicksilver 8M0190470 High Performance Multi-Purpose Extreme Grease Marine Lubrication 14 oz Cartridge 8M0190470. Overview. There's a certain calm that settles in when you know every moving part on your boat is protected. It's that quiet confidence you feel when you throttle up before sunrise or ease back into the marina after a long run. Mercury Marine's High Performance Multi-Purpose Extreme Grease, part number 8M0190470, is one of those behind-the-scenes essentials that keeps everyt