Step-by-Step Northern Winterization Guide · United States · all prices

No maker publishes sales figures. These lists are built from best-seller and most-reviewed proxies (retailer rankings, review volume, awards) over the last five years — the source is shown under each entry.

1. Sta-Bil 360 Marine Ethanol Treatment — $28
   Vapor corrosion inhibitor coats above fuel line; prevents phase separation over 12 months.
2. Quicksilver Storage Seal Fogging Oil — $16
   Aerosol spray coats cylinder walls, rings, and valves with thick protective film preventing rust.
3. Star Brite Ez-to-Store Ez-to-Start — $22
   All-in-one winterizer with corrosion inhibitors and anti-varnish chemistry for marine fuel.
4. Camco DIY Boat Winterizer Flushing Kit — $48
   Gravity-fed tank with hose connects to flushing muffs; circulates non-toxic antifreeze effortlessly.
5. Mercury Quickstor Fuel Stabilizer — $19
   Official OEM storage stabilizer designed specifically for EFI and direct injection engines.
6. Yamalube Fuel Med RX + EFT Pack — $34
   Twin-bottle winter bundle protecting metal fuel tanks and internal engine surfaces from ethanol.
7. CRC Marine Engine Stor Fogging Oil — $14
   High-tack formula clings to piston surfaces and exhaust valves during cold sub-zero storage.
8. Moeller Dual-Feed Motor Flusher — $24
   Dual rectangular rubber cups deliver high water pressure from both sides to prevent dry pump runs.
9. Milton Lower Unit Gear Lube Drain/Fill Kit — $18
   Metric and imperial adapter fittings with silicone seals for clean mess-free lower unit oil changes.
10. Battery Tender 12V Winter Storage Maintainer — $42
    Smart trickle charger with micro-processor temperature compensation; maintains batteries over winter.