10 Best fuel additives of 2025

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Best Choice

1

Generic

High-Performance Fuel Additive for Turbo & Carbureted Engines 10026-15 oz Octane Booster
9.8

Exceptional

Our Rating
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Value for Money

2

Sea Foam
Sea Foam Motor Treatment Fuel & Oil Additive, SF16, 16 oz, Pack of 3
Main highlights

Versatile Motor Treatment
SeaFoam SF-16 Motor Treatment cleans and lubricates fuel systems, improves engine performance, and is suitable for gas and oil usage.

Ideal for Older Vehicles and Equipment
Best used in older cars, boats, and small engines to resolve issues like rough idling, hesitation, and poor acceleration.

Highly Effective Engine Cleaner
Customers frequently praise its ability to clean engine components, resulting in smoother performance and extended engine life.
9.6

Exceptional

Our Rating

9.9
Precision

9.9
Simple to use

9.5
worth the money
3

Lucas Oil
Lucas Oil 10003 Fuel Treatment - 1 Quart
Main highlights

Fuel System Efficiency
Cleans and lubricates the fuel system, improving MPG and reducing emissions.

Versatile Application
Ideal for gasoline and diesel engines, including older engines needing lead replacement.

Customer Praised Performance
Highly effective in restoring engine power and smooth operation.
9.3

Excellent

Our Rating

9.9
Simple to use

9.7
worth the money

9.5
Long life
4

STA-BIL
STA-BIL Storage Fuel Stabilizer | Keeps Fuel Fresh for 24 Months, Prevents Corrosion, Gasoline Treatment Fuel Additive that Protects Fuel System, Gas Stabilizer for Fuel Storage, 32 oz.
Main highlights

Fuel Freshness for 24 Months
Preserves fuel freshness for up to 24 months, perfect for long-term storage.

Ideal for Seasonal Equipment
Perfect for storing vehicles, lawnmowers, and generators during off-season.

Highly Praised for Easy Starts
Users frequently commend its ability to ensure smooth engine starts.
9.1

Excellent

Our Rating

9.5
Simple to use

9.3
worth the money

8.0
dispense easily
5

Generic

Motor Treatment Additive – Cleans Fuel Injectors, Lubricates Upper Cylinders, Stabilizer – 16 oz | Model SF16 | 2 Pack
8.9

Very Good

Our Rating
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6

Chevron
Chevron Techron Concentrate Plus Fuel System Cleaner, 20 oz., Pack of 1
Main highlights

Effective Fuel System Cleaner
Reduces rough idle, engine surge, hesitation, and spark plug fouling.

Versatile Use Cases
Ideal for cars, motorcycles, lawn mowers, and garden equipment.

Highly Praised Performance
Customers appreciate its ability to improve engine smoothness and fuel efficiency.
8.8

Very Good

Our Rating

9.7
Simple to use

9.7
materials Quality

9.1
Long life
7

Royal Purple
Royal Purple 18000 Max Atomizer Fuel Injector Cleaner, 6 fl. oz.
Main highlights

Fuel Efficiency Booster
Restores fuel economy and maximizes horsepower for better performance.

Versatile Engine Compatibility
Ideal for both gasoline and diesel engines, stabilizes ethanol.

Customer Praised Effectiveness
Improves engine responsiveness and smoothness, as noted in reviews.
8.7

Very Good

Our Rating

9.7
Simple to use

8.9
worth the money

8.7
distance
8

Lucas Oil
Lucas Oil 10977 High Mileage Fuel Treatment - 5.25 Ounce

42% Off
Main highlights

Cleans and Protects Engine
Lucas Oil 10977 cleans fuel injectors, reduces deposits, and lubricates critical components for enhanced engine performance.

Ideal for Older Vehicles
Perfect for older engines, reducing oil contamination and improving smoothness.

Improves Engine Smoothness
Customers praise its ability to make engines run smoother and reduce knocking.
Key specs
- product dimensions:1.6 x 1.6 x 7.5 inches
- item size:5.25 Ounce
- special features:Clean fuel injectors
- fuel type:N/A
- package dimensions:N/A
8.6

Very Good

Our Rating
9

Chevron
Chevron Techron High Mileage Fuel System Cleaner, 12 oz, Pack of 1
Main highlights

Restores Power and Performance
Removes gum, varnish, and deposits, enhancing engine efficiency and power.

Ideal for High Mileage Vehicles
Perfect for older vehicles, preventing carbon build-up and corrosion.

Highly Recommended by Users
Praised for effectiveness and value, with consistent top ratings.
Key specs
- Application Method:Fuel system cleaner
- Performance Improvement:Restores lost power
- Volume:12 ounces
- Compatibility:E10, E85, etc.
- Cleaner Function:Restore power and performance
8.4

Good

Our Rating

9.7
Simple to use

9.1
Long life

8.9
worth the money
10

Red Line
Red Line 60103 SI-1 Complete Fuel System Cleaner, Cleans and Prevents Corrosion in Fuel Systems, Cleans Injectors, Carburetors, Valve and Combustion Chamber Deposits - 15 Ounce
Main highlights

Comprehensive Cleaning Power
Red Line SI-1 effectively cleans injectors, carburetors, and valves.

Ideal for Older Vehicles
Best used in vehicles with suspected fuel system fouling.

Notable Mileage Improvement
Customers report significant gas mileage increases after treatment.
Key specs
- Application Method:One bottle per tank
- Performance Improvement:Enhances gasoline stability
- Volume:15 Ounce
- Compatibility:Fuel systems
- Cleaner Function:Cleans injectors and carburetors
8.1

Good

Our Rating

9.7
Simple to use

9.5
quality of ingredients

9.3
worth the money

10 Best fuel additives of 2025

1

High-Performance Fuel Additive for Turbo & Carbureted Engines 10026-15 oz Octane Booster

How do we rank?

How do we rank?

Analyzing top stores

2

Sea Foam Motor Treatment Fuel & Oil Additive, SF16, 16 oz, Pack of 3

9.9

9.9

9.5

3

Lucas Oil 10003 Fuel Treatment - 1 Quart

9.9

9.7

9.5

4

STA-BIL Storage Fuel Stabilizer | Keeps Fuel Fresh for 24 Months, Prevents Corrosion, Gasoline Treatment Fuel Additive that Protects Fuel System, Gas Stabilizer for Fuel Storage, 32 oz.

9.5

9.3

8.0

5

Motor Treatment Additive – Cleans Fuel Injectors, Lubricates Upper Cylinders, Stabilizer – 16 oz | Model SF16 | 2 Pack

6

Chevron Techron Concentrate Plus Fuel System Cleaner, 20 oz., Pack of 1

9.7

9.7

9.1

7

Royal Purple 18000 Max Atomizer Fuel Injector Cleaner, 6 fl. oz.

9.7

8.9

8.7

8

Lucas Oil 10977 High Mileage Fuel Treatment - 5.25 Ounce

9

Chevron Techron High Mileage Fuel System Cleaner, 12 oz, Pack of 1

9.7

9.1

8.9

10

Red Line 60103 SI-1 Complete Fuel System Cleaner, Cleans and Prevents Corrosion in Fuel Systems, Cleans Injectors, Carburetors, Valve and Combustion Chamber Deposits - 15 Ounce

9.7

9.5

9.3

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High-Performance Fuel Additive for Turbo & Carbureted Engines 10026-15 oz Octane Booster