10 Best fuel additive (2025)

• The world’s #1 fuel additive for both gasoline and diesel engines
• A great tune-up in a bottle – treats gasoline, diesel fuel and increases MPG
• Cleans and lubricates the fuel system, including fuel injectors, carburetor and combustion chamber
• Improves fuel economy by burning excess exhaust emissions
• Increases power and acceleration by improving fuel flow and reducing deposit buildup

• QUALITY ASSURED
• Reduces: rough idle, engine surge, hesitation, and spark plus fouling
• 20 oz. bottle.
• Improves: cold start performance, and fuel stability for up to one year

• Keeps fuel fresh for up to 24 months during storage
• Eliminates need to drain fuel prior to storage
• Ensures quick, easy starts after storage
• Effective in all gasoline, including ethanol blends

• Revitalize Your Engine: Gumout Multi-System Tune-Up is your ultimate fuel treatment gasoline solution, effortlessly cleaning GDI injectors, carburetors, and more for peak performance and fuel economy.
• Ultimate Engine Protection: Our advanced carburetor cleaner fuel additive prevents future carbon buildup, ensuring your engine runs smoothly. Perfect for gas, diesel, or ethanol engines, from cars to lawn mowers.
• Comprehensive Care: As a powerful fuel tank cleaner, Gumout cleans and conditions fuel systems, fighting ethanol and water corrosion while stabilizing fuel to reduce emissions and maximize engine life.
• Versatile Application: Add this gas treatment for car engines directly to the gas tank, crankcase, or via induction. Whether you're cleaning a carburetor or stabilizing gas, Gumout Multi-System Tune-Up has you covered.

• Contains 100% High-Energy Solvent Technology
• Helps Keep Injectors Or Carb(S) And Intake Ports And Valves Clean
• Quickly Disperses Moisture And Dissolves Gum, Varnish, And Other Fuel Residues
• Disperses Moisture In Conventional Gasoline

• SeaFoam SF-16 Motor Treatment 16 oz. Can (3)

• Restores fuel economy
• Stabilizes ethanol
• Maximizes horsepower
• Improves responsiveness
• For use in both gasoline and diesel engines

• ALL-ROUND ENGINE SOLUTION - Works in all engines and all fuels, making it the ideal fuel treatment and stabilizer for any vehicle or gas powered tool
• ETHANOL PROBLEM SOLVER - Prevents and cures most ethanol-related issues, including poor performance and decreased fuel economy
• OLD FUEL REVITALIZER - Stabilizes fuel up to 2 years and can help rejuvenate old, sub-spec fuel, even after months of inactivity
• FUEL ECONOMY MAXIMIZER - Removes and prevents gum, carbon deposits, and varnish build-up, resulting in improved fuel economy
• WATER BUILD-UP PREVENTION - Disperses water throughout fuel as submicron-sized droplets that are safely eliminated while the engine operates

• Specially formulated to remove carbon deposits from engines with over 75,000 miles
• Cleans fuel injectors, intake valves, and ports to restore performance and fuel economy
• Prevents future carbon build-up and reduces emissions
• Oxygen sensor safe and safe for use in turbocharged and supercharged vehicles
• Will not void OEM/manufacturer's warranty

This ATS Chemical 505 CRF Fuel System Treatment, 16 fluid ounces is a top choice in . Customers appreciate its quality, performance, and value.