Quicksilver - Storage Seal Engine Fogging Oil Heavy-Duty Protective Formula 858081Q03. Overview. Every boater knows that engines don't like sitting still. Salt, moisture, and time have a way of sneaking into places they don't belong - and when the season ends, your best defense is preparation. That's where Quicksilver Storage Seal Engine Fogging Oil comes in. It's the quiet protector that keeps your engine safe while you're away, coating every surface with a film of security so that, months late