10 Best Diesel Additive to Remove Water in the Fuel Tank in 2026
- Boosts cetane levels by up to 7 points for improved combustion
- Enhances engine power, performance, and fuel efficiency
- Stabilizes fuel and helps disperse moisture
- Improves lubricity, preventing rust and corrosion in the fuel system
- Boosts cetane levels by up to 7 points for improved combustion
- Enhances engine power, performance, and fuel efficiency
- Stabilizes fuel and helps disperse moisture
- Improves lubricity, preventing rust and corrosion in the fuel system
- Cleans and protects the entire fuel system, including valves, pumps, rings, pistons, and upper cylinders.
- Prevents buildup of internal and external diesel injector deposits to maintain engine performance.
- Increases cetane levels, enhancing combustion efficiency and potentially improving fuel economy and power.
- Disperses moisture and prevents rust and corrosion with military-grade inhibitors, promoting better engine performance.
- Simple application process—add 8 oz. per 20 gallons of fuel or every 6,000 miles.
- Engineered for performance and longevity, ensuring high-quality standards in every product.
- Cleans and protects the entire fuel system, including valves, pumps, rings, pistons, and upper cylinders.
- Prevents buildup of internal and external diesel injector deposits to maintain engine performance.
- Increases cetane levels, enhancing combustion efficiency and potentially improving fuel economy and power.
- Disperses moisture and prevents rust and corrosion with military-grade inhibitors, promoting better engine performance.
- Effectively kills bacteria and fungi in aviation fuels, preventing microbial growth and lubricating injectors and fuel pumps.
- Utilizes dual-phase chemistry to separate water and fuel, providing comprehensive protection against microbial contamination and corrosion, and safeguarding against acidic by-products.
- Prevents sludge accumulation and clogged filters, extending fuel filter life and reducing the need for costly fuel polishing through proactive biocide use.
- Enhances the lubricity of jet fuel, offering improved protection and reduced wear on fuel delivery components.
- OEM approved for restoring lubricity levels, surpassing ASTM standards to protect against premature wear of injectors and pumps.
- Effectively kills bacteria and fungi in aviation fuels, preventing microbial growth and lubricating injectors and fuel pumps.
- Utilizes dual-phase chemistry to separate water and fuel, providing comprehensive protection against microbial contamination and corrosion, and safeguarding against acidic by-products.
- Prevents sludge accumulation and clogged filters, extending fuel filter life and reducing the need for costly fuel polishing through proactive biocide use.
- Maintains diesel engine performance and health with regular use.
- Boosts cetane levels by up to 7 points for improved fuel economy and reduced maintenance.
- Cleans fuel injectors and enhances fuel lubricity, increasing engine longevity.
- Prevents rust and corrosion while demulsifying moisture and stabilizing fuel.
- Easy application at each fill-up: 1 oz. or 2 oz. per 25 gallons of diesel.
- Scientifically formulated to enhance efficiency and prolong equipment life.
- Maintains diesel engine performance and health with regular use.
- Boosts cetane levels by up to 7 points for improved fuel economy and reduced maintenance.
- Cleans fuel injectors and enhances fuel lubricity, increasing engine longevity.
- Prevents rust and corrosion while demulsifying moisture and stabilizing fuel.
- Easy application at each fill-up: 1 oz. or 2 oz. per 25 gallons of diesel.
- Mechanic In A Bottle is designed for fuel injectors and the complete fuel system, ensuring efficient starting and optimal operation.
- Contains a superior blend of antioxidants and anticorrosive agents.
- Effectively removes varnish, shellac, and carbon deposits while also dispersing water in the fuel system.
- Suitable for use in carburetors, injectors, and internal engine components.
- Mechanic In A Bottle is designed for fuel injectors and the complete fuel system, ensuring efficient starting and optimal operation.
- Contains a superior blend of antioxidants and anticorrosive agents.
- Effectively removes varnish, shellac, and carbon deposits while also dispersing water in the fuel system.
- Suitable for use in carburetors, injectors, and internal engine components.
- Safe for use in all diesel engines by dispersing contaminants and removing water
- Provides long-term storage stability to keep fuel fresh
- Prevents fuel-filter clogging and protects against tank corrosion
- Works effectively with Bio Kleene Diesel Fuel Biocide to eliminate water and contaminants after microbial contamination
- Compatible with all diesel fuels, including Ultra Low Sulfur Diesel (ULSD) and biodiesel; contains no alcohol
- Safe for use in all diesel engines by dispersing contaminants and removing water
- Provides long-term storage stability to keep fuel fresh
- Prevents fuel-filter clogging and protects against tank corrosion
- Works effectively with Bio Kleene Diesel Fuel Biocide to eliminate water and contaminants after microbial contamination
- Disperses contaminants in diesel fuel
- Maintains long-term storage stability for fresh fuel
- Prevents clogging of fuel filters
- Works with Bio Kleen Diesel Fuel Biocide to eliminate residual water and contaminants during clean-up
- Compatible with all diesel fuels, including ULSD and biodiesel blends
- Disperses contaminants in diesel fuel
- Maintains long-term storage stability for fresh fuel
- Prevents clogging of fuel filters
- Works with Bio Kleen Diesel Fuel Biocide to eliminate residual water and contaminants during clean-up
- Compatible with all diesel fuels, including ULSD and biodiesel blends
- Absorbs water quickly without absorbing fuel
- Prevents frozen fuel lines and gelled fuel
- Combats rust and filter blockage to reduce engine wear
- Durable cotton exterior with unbreakable plastic casing
- Removes water from gasoline, diesel, kerosene, and heating oil
- Holds up to 7.2 ounces and is easy to deploy and retrieve
- Absorbs water quickly without absorbing fuel
- Prevents frozen fuel lines and gelled fuel
- Combats rust and filter blockage to reduce engine wear
- Durable cotton exterior with unbreakable plastic casing
- Removes water from gasoline, diesel, kerosene, and heating oil
- Holds up to 7.2 ounces and is easy to deploy and retrieve
- Disperses contaminants in diesel fuel
- Eliminates water and sludge
- Prevents rust in fuel tanks
- Reduces fuel-filter clogging
- Compatible with all diesel engines
- Disperses contaminants in diesel fuel
- Eliminates water and sludge
- Prevents rust in fuel tanks
- Reduces fuel-filter clogging
- Compatible with all diesel engines
- Disperses contaminants in diesel fuel
- Eliminates water and sludge
- Prevents rust in fuel tanks
- Reduces fuel-filter clogging
- Compatible with all diesel engines
- Disperses contaminants in diesel fuel
- Eliminates water and sludge
- Prevents rust in fuel tanks
- Reduces fuel-filter clogging
- Compatible with all diesel engines
How We Estimate & Rank
We make shopping simple by hand-picking the top 10 Diesel Additive to Remove Water in the Fuel Tank just for you. Our team focuses on what’s available right now, what’s popular with other shoppers, and, most importantly, what’s most relevant to your search. We cover leading brands such as Hot Shot's Secret, BIOBOR, B3C Fuel Solutions, Power Service, PIG, and other trusted names in this category. By filtering out the noise, we ensure you only see high-quality options that actually meet your needs. It’s all the best finds, minus the endless scrolling!
Final Recommendations
We’ve selected three standout options to make your choice easier.
Our overall winner is Hot Shot’s Secret Everyday Diesel Treatment EDT 16 oz Squeeze – Treats 400 Gallons – 6-in-1 Diesel Fuel Additive by Hot Shot's Secret, earning top marks for its balanced combination of quality, performance, and price.
The best value for most shoppers is Hot Shot's Secret Diesel Extreme 32 oz – Treats 80 Gallons – Concentrated Diesel Fuel Additive by Hot Shot's Secret, earning consistently positive feedback for its performance and accessible pricing.
The best deal available right now for Diesel Additives is Hot Shot’s Secret Everyday Diesel Treatment EDT 1 Gallon – Treats 3200 Gallons – 6-in-1 Diesel Fuel Additive by Hot Shot's Secret, now offered at 28% off.
