STA-BIL Diesel Fuel Stabilizer 1 Gallon — 12-Month Storage Protection, Water-Dispersing Formula

STA-BIL Diesel Fuel Stabilizer 1 Gallon is a concentrated fuel treatment that preserves diesel for up to one year while cleaning, lubricating, and protecting your fuel system.

When diesel sits in tanks, equipment, or seasonal vehicles it can oxidize, form sludge, and trap water—leading to poor performance or fuel system damage. STA-BIL’s diesel formula is engineered to address those problems: it stabilizes fuel, disperses and removes water, and leaves protective additives to clean injectors and lubricate pumps. Use it at the pump or when filling storage tanks to reduce maintenance and extend the usable life of diesel fuel.

How does STA-BIL protect diesel during long-term storage?

The stabilizer slows oxidation and prevents the formation of sludge and sediment that occur when diesel ages. It keeps the fuel chemistry balanced so combustion remains consistent and deposits don’t accumulate in tanks or filters.

• Treatment preserves diesel quality for up to 12 months.
• Anti-oxidants reduce thermal breakdown of fuel components.
• Detergent components keep tanks and injectors cleaner.
• Corrosion inhibitors protect metal surfaces inside the fuel system.

Will this product help with water and contamination in my tank?

Yes—STA-BIL’s formulation includes water-dispersing chemistry that helps eliminate free water from diesel fuel, reducing microbial growth and corrosion risk. Removing water helps maintain consistent combustion and lowers the chance of clogged filters or damaged fuel pumps.

• Water removal technology disperses small amounts of water for safe combustion.
• Reduces conditions that encourage microbial sludge (diesel bug).
• Helps prevent filter blockages from water-correlated deposits.
• Supports long-term storage of tanks and seasonal equipment.

How do I use STA-BIL Diesel Fuel Stabilizer and what is the dose?

Application is simple: add STA-BIL to fresh diesel when filling the tank for best results, though it can be added to stored fuel as well. The recommended treat rate is 1 ounce of STA-BIL per 10 gallons of diesel—one gallon bottle covers many tanks and seasonal needs.

• Treat rate: 1 oz per 10 gallons of diesel fuel.
• Best practice: add at the pump with fresh fill-ups for continuous protection.
• Can be used with ULSD and biodiesel blends without compatibility issues.
• Label recommends marking bottle open date; products good up to two years after opening.

What benefits will I notice in my diesel vehicle or equipment?

Regular use reduces the likelihood of sludge-related blockages and keeps injectors and pumps better lubricated, which supports reliable starts and steady engine operation. While it is not a repair solution for mechanical faults, it reduces fuel-system-related issues and helps maintain fuel quality during storage periods.

• Cleaner fuel system components and fewer deposit-related problems.
• Improved lubrication for fuel pumps and injectors.
• Lower risk of corrosion and water-related failures.
• Consistent performance after seasonal storage or long idle periods.

Who is this for? STA-BIL Diesel Fuel Stabilizer 1 Gallon is aimed at owners and operators who store diesel or run equipment seasonally: farmers, fleet managers, construction crews, marine operators, and recreational vehicle owners. It’s particularly useful for those who fill storage tanks, maintain tractors or generators, or want a preventive product to add at every fill-up. The concentrated gallon size is ideal for workshops, fleets, and farms that treat multiple tanks or vehicles and prefer one reliable, economical stabilizer.