February 21, 2026

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10 Best fuel additives of 2026

Save up to 17% off

1

ComStar

ComStar Super Heat, 8-in-1 Fuel Oil Treatment, 16 Ounces, Controls Waxing & Jelling, Melts Ice, Lowers Pour Point, Dissolves Sludge, Reduces Soot, Rust, Water, Cleans Parts, Made in USA (Pack of 24)
9.8

Exceptional

Our Rating
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Based on millions of stores and reviews

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Analyzing top stores
2

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 (2 Pack)
Main highlights

Comprehensive Cleaning and Protection
Red Line SI-1 cleans injectors, carburetors, valves, and prevents corrosion.

Ideal for Performance Boost
Best used in vehicles needing enhanced performance and smoother engine operation.

Customer-Praised Performance Improvement
Notable increase in vehicle performance and fuel efficiency.
9.5

Excellent

Our Rating

9.9
Simple to use

9.3
Precision

9.1
worth the money
3

Lucas Oil
Lucas Oil 10003 Fuel Treatment - 1 Quart

17% Off
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.
9.2

Excellent

Our Rating

9.9
Simple to use

9.7
worth the money

9.5
Long life
4

Lucas Oil
Lucas Oil 10003 Fuel Treatment - 1 Quart

17% Off
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.
8.9

Very Good

Our Rating

9.9
Simple to use

9.7
worth the money

9.5
Long life
5

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.
8.7

Very Good

Our Rating

9.5
Simple to use

9.3
worth the money

8.0
dispense easily
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6

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.
8.5

Good

Our Rating

9.5
Simple to use

9.3
worth the money

8.0
dispense easily
7

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 (2 Pack)

11% Off
Main highlights

Comprehensive Cleaning and Protection
Red Line SI-1 cleans injectors, carburetors, valves, and prevents corrosion.

Ideal for Performance Boost
Best used in vehicles needing enhanced performance and smoother engine operation.

Customer-Praised Performance Improvement
Notable increase in vehicle performance and fuel efficiency.
8.2

Good

Our Rating

9.9
Simple to use

9.3
Precision

9.1
worth the money
8

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.
8.1

Good

Our Rating

9.7
Simple to use

9.7
materials Quality

9.1
Long life
9

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.
8.0

Good

Our Rating

9.7
Simple to use

9.7
materials Quality

9.1
Long life
10

Lucas Oil
Lucas Oil 10020 Upper Cylinder Lube/Fuel Treatment - 5.25 fl oz.
Main highlights

Fuel System Lubrication and Cleaning
Cleans and lubricates the fuel system, including fuel injectors, carburetor, and combustion chamber. Neutralizes sulfur and other harmful contaminants, improving fuel economy and engine performance.

Versatile Application for Various Engines
Ideal for gasoline and diesel engines, including cars, trucks, lawnmowers, boats, and motorcycles. Suitable for both high RPM and heavy-duty applications.

Improved Engine Performance and Smooth Operation
Customers frequently praise the product for improving engine performance, reducing rough running, and preventing issues like sputtering and stalling.
7.9

Good

Our Rating

9.7
Simple to use

9.5
worth the money

9.5
Long life

10 Best fuel additives of 2026

1

ComStar Super Heat, 8-in-1 Fuel Oil Treatment, 16 Ounces, Controls Waxing & Jelling, Melts Ice, Lowers Pour Point, Dissolves Sludge, Reduces Soot, Rust, Water, Cleans Parts, Made in USA (Pack of 24)

How do we rank?

How do we rank?

Analyzing top stores

2

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 (2 Pack)

9.9

9.3

9.1

3

Lucas Oil 10003 Fuel Treatment - 1 Quart

9.9

9.7

9.5

4

Lucas Oil 10003 Fuel Treatment - 1 Quart

9.9

9.7

9.5

5

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

6

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

7

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 (2 Pack)

9.9

9.3

9.1

8

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

9.7

9.7

9.1

9

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

9.7

9.7

9.1

10

Lucas Oil 10020 Upper Cylinder Lube/Fuel Treatment - 5.25 fl oz.

9.7

9.5

9.5

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