10 Best gasoline additives of 2025

Save up to 48% off

Best Choice

1

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.
9.8

Exceptional

Our Rating

9.9
Precision

9.9
Simple to use

9.5
worth the money
How do we rank?

Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you

Careful review Our team ensures quality, value, and fit based on real user feedback

Trusted insights AI and human analysis guide your decisions, reflecting real user priorities
Real users impact

Thousands of users trust our site daily

Based on millions of stores and reviews

Shoppers influence our rankings
Analyzing top stores
Value for Money

2

STAR BRITE
STAR BRITE Star Tron Enzyme Fuel Treatment - Concentrated Formula 32 Fl. Oz. – Treats up to 512 Gallons - Fuel Stabilizer & Treatment, Gasoline Stabilizer, Star Tron Marine Enzyme Fuel Treatment
Main highlights

All-Engine Fuel Solution
Works in all engines and fuels, ideal for vehicles and tools.

Ethanol Problem Solver
Prevents and cures ethanol-related issues, ensuring better performance.

Highly Praised for Reliability
Customers appreciate its effectiveness in preventing fuel-related problems.
Key specs
- fuel type:All engines and fuels
- special features:Ethanol problem solver
- product dimensions:3 x 4.5 x 10.25 inches
- item size:1.9 pounds
- package dimensions:N/A
9.5

Excellent

Our Rating

9.3
worth the money

9.1
distance
3

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.
9.3

Excellent

Our Rating

9.5
Simple to use

9.3
worth the money

8.0
dispense easily
4

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.
9.2

Excellent

Our Rating

9.7
Simple to use

9.7
materials Quality

9.1
Long life
5

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.
8.9

Very Good

Our Rating

9.9
Simple to use

9.7
worth the money

9.5
Long life
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6

Hot Shot's Secret
‎Hot Shot's Secret Gasoline Extreme 12 Oz, Concentrated Fuel System Cleaner, Fuel Additive for Gasoline Engines, Fuel Injector Cleaner - Increases Fuel Economy & Restores Engine Performance
Main highlights

Deep Fuel System Cleaning
Cleans, lubricates, and protects the entire gasoline fuel system and engine components.

Ideal for Performance Restoration
Acts as an engine flush to dissolve deposits and restore engine power.

Praised for Enhanced Throttle Response
Customers appreciate improved throttle response and fuel economy after use.
Key specs
- fuel type:Gasoline
- special features:Deeply cleans, lubricates
- product dimensions:N/A
- item size:N/A
- package dimensions:N/A
8.8

Very Good

Our Rating
7

STAR BRITE
STAR BRITE Star Tron Enzyme Fuel Treatment, Small Engine Formula, 8 Fl Oz – Treats up to 48 Gals – Gas Additive Rejuvenates & Stabilizes Old Gasoline, Cures & Prevents Ethanol Problems (14308) , Blue

25% Off
Main highlights

Enhanced Engine Performance
Star Tron Enzyme Fuel Treatment uses advanced enzyme technology to ensure all engines start easily and run smoothly, even after months of inactivity.

Versatile Application
Ideal for use in cars, boats, RVs, lawn mowers, and all other engines and fuel types, making it a versatile fuel treatment and stabilizer.

Reliable Fuel Stabilization
Customers frequently praise its ability to stabilize fuel for up to 2 years, ensuring engines start easily even after long periods of storage.
8.7

Very Good

Our Rating

9.9
Simple to use

9.9
Stability

9.7
Sheerness
8

STAR BRITE
Star Tron Enzyme Fuel Treatment - Small Engine Formula - 16 Oz Treats up to 96 Gals, Gas Additive Rejuvenates & Stabilizes Old Gasoline, Cures & Prevents Ethanol Problems, Improves MPG (014316)

37% Off
Main highlights

Unleash Engine Potential
Advanced enzyme technology ensures engines start easily and run smoothly.

Ideal for Storage
Perfect for storing items over the off-season, preventing fuel degradation.

Long-Term Reliability
Praised for maintaining engine longevity and performance over decades.
8.5

Good

Our Rating
9

STP
STP Octane Booster, Bottled Fuel System Cleaner Restores Lost Power and Acceleration, 5.25 Oz, STP

48% Off
Main highlights

Boosts Octane and Performance
This product effectively boosts octane, reduces knocking and pinging, and helps restore overall engine performance for a smoother driving experience.

Ideal for Premium Gas Replacement
Perfect for cars requiring premium gas, especially in scenarios where high-octane fuel is unavailable. Great for long commutes and performance vehicles.

Improved Fuel Efficiency
Customers consistently praise the noticeable increase in miles per gallon and smoother engine performance across various car models.
Key specs
- performance:Restores performance
- octane boost:Boosts octane
- cleaning:N/A
- safe for parts:N/A
- active ingredients:N/A
8.4

Good

Our Rating

9.3
worth the money

9.3
distance
10

Gumout
Gumout 510013W-6PK Fuel System Cleaner, 6 Pack
Main highlights

Restores Performance and Economy
Specially formulated to clean carbon deposits, improving engine performance and fuel economy.

Ideal for High Mileage Engines
Best for vehicles with over 75,000 miles, ensuring optimal performance.

Praised for Mileage Boost
Customers report noticeable improvements in mileage and engine smoothness.
8.3

Good

Our Rating

9.9
Simple to use

9.3
worth the money

9.1
distance

10 Best gasoline additives of 2025

1

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

9.9

9.9

9.5

How do we rank?

How do we rank?

Analyzing top stores

2

STAR BRITE Star Tron Enzyme Fuel Treatment - Concentrated Formula 32 Fl. Oz. – Treats up to 512 Gallons - Fuel Stabilizer & Treatment, Gasoline Stabilizer, Star Tron Marine Enzyme Fuel Treatment

9.3

9.1

3

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

4

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

9.7

9.7

9.1

5

Lucas Oil 10003 Fuel Treatment - 1 Quart

9.9

9.7

9.5

6

‎Hot Shot's Secret Gasoline Extreme 12 Oz, Concentrated Fuel System Cleaner, Fuel Additive for Gasoline Engines, Fuel Injector Cleaner - Increases Fuel Economy & Restores Engine Performance

7

STAR BRITE Star Tron Enzyme Fuel Treatment, Small Engine Formula, 8 Fl Oz – Treats up to 48 Gals – Gas Additive Rejuvenates & Stabilizes Old Gasoline, Cures & Prevents Ethanol Problems (14308) , Blue

9.9

9.9

9.7

8

Star Tron Enzyme Fuel Treatment - Small Engine Formula - 16 Oz Treats up to 96 Gals, Gas Additive Rejuvenates & Stabilizes Old Gasoline, Cures & Prevents Ethanol Problems, Improves MPG (014316)

9

STP Octane Booster, Bottled Fuel System Cleaner Restores Lost Power and Acceleration, 5.25 Oz, STP

9.3

9.3

10

Gumout 510013W-6PK Fuel System Cleaner, 6 Pack

9.9

9.3

9.1

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