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10 Best Fuel Additive of December 2025
List of Top Rated Fuel Additive from thousands of customer reviews & feedback.
Updated On Dec 2025
2,984 Reviews Studied
1
Star Tron Enzyme Fuel Treatment - Regular Gas Formula 8 oz - Treats 48 Gallons, Model Number: 14308 Read Review
- Cures and prevents ethanol fuel problems
- Helps prevent phase separation
- Makes engines start easily, run smooth
- Stabilizes gasoline for up to 2 years
- This item is not for sale in Catalina Island
2
STA-BIL 360 Marine Ethanol Treatment and Fuel Stabilizer - Prevents Corrosion - Helps Clean Fuel System For Improved In-... Read Review
- Auto & Truck Maintenance
- Country of manufacture: United States
- Manufacturer: STA-BIL
3
Performance Formula One Shot 8oz, Case of 24 Bottles Treats 30 gallons Diesel Fuel per Bottle Read Review
- Restores/Increase Horsepower: detergents clean deposits in the injection system
- Reduces Fuel Consumption tests show an average of 4 percent improvement in MPG and gains up to 9.6 Percent
- Cetane Improver improves combustion resulting in better engine starting, running and reduced noise
- Reduces Wear: Lubricity improvers restore lubricity to ultra low sulfur diesel fuels
- Reduces Emissions reduces Smoke and Particulates
5
STA-BIL (22214) Storage Fuel Stabilizer - Guaranteed To Keep Fuel Fresh Fuel Up To Two Years - Effective In All Gasoline... Read Review
- 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
- For all gasoline engines, including 2-cycle
6
Star Tron Enzyme Fuel Treatment - Concentrated Formula 32 oz - Treats 512 Gallons Read Review
- Cures and prevents ethanol fuel problems; helps prevent phase separation
- For everyday use and seasonal storage; stabilizes fuel for up to 2 years and can help rejuvenate old, sub-spec fuel
- Makes engines start easily and run smoothly; improves fuel economy and reduces emissions
- Cleans valves and injectors of carbon deposits, gums and varnish for maximum performance, increased fuel efficiency and reduced emissions
- Concentrated formula #930XX is economical to use in large and small applications; safe for use in all engines (including 2-cycle pre-mix)
7
Sea Foam IC5 Fuel Injector Cleaner, 5.25 oz Read Review
- Add to fuel to help clean fuel injectors and restore injector spray patterns
- Adds lubricity to upper cylinders
- Helps recover lost MPG and reduce exhaust emissions
- Concentrated formula treats up to 25 gallons
- Safe for all types of gasoline fuel injection engines
8
LUCAS LUC10013 10013 Fuel Treatment - 1 Gallon Read Review
- Fit Type: Vehicle Specific
- Package Dimensions: 7.23 L x 4.93 H x 5.75 W (inches)
- Package Weight : 8 pounds
- Country of Origin : United States
9
Sea Foam SF-16 Motor Treatment - 16 oz. Read Review
- Cleans injectors, carb jets and passageways
- Cleans and lubricates intake valves, pistons and cylinders
- Dissolves and cleans fuel residue in fuel systems
- Dissolves oil deposits in crankcase
- Clean timing chain tensioners and VVT actuators, quiet noisy lifters
- 100 percent pure petroleum
- EPA registered product
- Liquefies gum and varnish deposits or internal engine contaminants
- Special Shipping Information: This item cannot be returned and has additional shipping restrictions
- Special Shipping Information: This item cannot be returned and has additional shipping restrictions
10
Stanadyne Performance Formula Diesel Fuel Additive - 16 Oz. Case of 12 Read Review
- Restores/Increase Horsepower: detergents clean deposits in the injection system
- Reduces Fuel Consumption tests show an average of 4 percent improvement in MPG and gains up to 9.6 Percent
- Cetane Improver improves combustion resulting in better engine starting, running and reduced noise
- Reduces Wear: Lubricity improvers restore lubricity to ultra low sulfur diesel fuels
- Reduces Emissions reduces Smoke and Particulates
