10 Best additives of 2026

Save up to 31% off

1

Prolube

Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise, Vibration - Boosts Fuel Economy & Horsepower - Works on Transmissions & Differentials (1QT)
9.9

Exceptional

Our Rating
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2

Liqui Moly
LIQUI MOLY Oil Additive Cera Tec 20002 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance, Less Friction & Lower Fuel Consumption 300 ml

31% Off
Main highlights

Superior Wear Protection
Stable under high loads; reduces wear and tear in engines.

Versatile Application
Ideal for petrol and diesel engines; compatible with all motor oils.

Customer-Praised Noise Reduction
Commonly praised for reducing engine noise and improving smoothness.
Key specs
- performance:Stable under high loads
- engine protection:No deposits
- compatibility:Compatible with all oils
- viscosity:N/A
- friction reduction:N/A
9.8

Exceptional

Our Rating

9.5
Long life

9.3
worth the money

9.3
Noise level
3

Oxyfresh
Oxyfresh Premium Pet Dental Care Solution Pet Water Additive: Best Way to Eliminate Bad Dog Breath and Cat Bad Breath - Fights Tartar & Plaque - So Easy, Just Add to Water! Vet Recommended 16 oz.
Main highlights

Fresh Breath Solution
Eliminates bad breath in pets with a fast-acting, easy-to-use water additive.

Hassle-Free Dental Care
Ideal for pet owners seeking an effortless way to maintain oral hygiene without brushing.

Customer Praised Effectiveness
Most users report significant improvement in pet breath and dental health.
Key specs
- Target Species:Dogs and cats
- Form:Liquid
- Dental Benefits:Fights plaque and tartar
- Packaging:2.52 x 2.52 x 7.8 inches
- Flavor:Odorless and tasteless
9.6

Exceptional

Our Rating

9.5
Simple to use

8.9
Aroma

8.7
Flavor
4

Oxyfresh
Oxyfresh Premium Pet Dental Care Solution Pet Water Additive: Best Way to Eliminate Bad Dog Breath and Cat Bad Breath - Fights Tartar & Plaque - So Easy, Just Add to Water! Vet Recommended 16 oz.
Main highlights

Fresh Breath Solution
Eliminates bad breath in pets with a fast-acting, easy-to-use water additive.

Hassle-Free Dental Care
Ideal for pet owners seeking an effortless way to maintain oral hygiene without brushing.

Customer Praised Effectiveness
Most users report significant improvement in pet breath and dental health.
Key specs
- Target Species:Dogs and cats
- Form:Liquid
- Dental Benefits:Fights plaque and tartar
- Packaging:2.52 x 2.52 x 7.8 inches
- Flavor:Odorless and tasteless
9.4

Excellent

Our Rating

9.5
Simple to use

8.9
Aroma

8.7
Flavor
5

STA-BIL

STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors and Injectors, Fixes Rough Running Engines, Eliminates Water, Treats Up to 20 Gallons, 8oz (22304) , Green

17% Off
9.2

Excellent

Our Rating

9.9
Stability

9.7
Simple to use

9.1
worth the money
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6

STA-BIL

STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors and Injectors, Fixes Rough Running Engines, Eliminates Water, Treats Up to 20 Gallons, 8oz (22304) , Green

17% Off
9.0

Excellent

Our Rating

9.9
Stability

9.7
Simple to use

9.1
worth the money
7

Skyhorse
A Consumer's Guide to Toxic Food Additives: How to Avoid Synthetic Sweeteners, Artificial Colors, MSG, and More

27% Off
Main highlights

Comprehensive Guide to Avoiding Additives
Provides detailed insights on avoiding synthetic sweeteners, artificial colors, MSG, and more.

Ideal for Health-Conscious Individuals
Perfect for those looking to eat clean and understand food additives.

Praised for Easy Language
Highly appreciated for its easy-to-understand language by readers.
Key specs
- paperback:216 pages
- isbn 10:1510753761
- language:English
- isbn 13:978-1510753761
- dimensions:5.5 x 0.7 x 8.25 inches
8.8

Very Good

Our Rating

9.9
Simple to use

9.7
worth the money

9.5
Instruction
8

Hot Shot's Secret
Hot Shot's Secret EDT+ Winter Defense, 7-in-1 Anti-Gel Diesel Fuel Additive, Prevents Gelling, Protects Diesel Fuel System, Diesel Additive Improves Cold Start, Boosts Cetane, 16oz, Packaging May Vary
Main highlights

Prevents Gelling in Cold Weather
Minimizes wax crystal formation in diesel fuel, allowing it to travel through the fuel system even at temperatures 20 F below the wax solidification point.

Ideal for Cold Starts and Winter Use
Perfect for diesel engines operating in subzero temperatures, boosting cetane and protecting the fuel system to ensure smooth starts and optimal performance.

Highly Praised for Improved Lubricity
Customers frequently praise the product for enhancing diesel lubricity, which protects and cleans fuel injectors, leading to smoother engine performance and increased fuel economy.
Key specs
- Lubricity:Increases diesel lubricity
- Fuel Economy:Improves fuel combustion
- Injector Cleaning:Fuel injector cleaner
- Water Removal:Disperses moisture
- Performance Enhancements:Improves cold starts
8.7

Very Good

Our Rating
9

Hot Shot's Secret
Hot Shot's Secret EDT+ Winter Defense, 7-in-1 Anti-Gel Diesel Fuel Additive, Prevents Gelling, Protects Diesel Fuel System, Diesel Additive Improves Cold Start, Boosts Cetane, 16oz, Packaging May Vary
Main highlights

Prevents Gelling in Cold Weather
Minimizes wax crystal formation in diesel fuel, allowing it to travel through the fuel system even at temperatures 20 F below the wax solidification point.

Ideal for Cold Starts and Winter Use
Perfect for diesel engines operating in subzero temperatures, boosting cetane and protecting the fuel system to ensure smooth starts and optimal performance.

Highly Praised for Improved Lubricity
Customers frequently praise the product for enhancing diesel lubricity, which protects and cleans fuel injectors, leading to smoother engine performance and increased fuel economy.
Key specs
- Lubricity:Increases diesel lubricity
- Fuel Economy:Improves fuel combustion
- Injector Cleaning:Fuel injector cleaner
- Water Removal:Disperses moisture
- Performance Enhancements:Improves cold starts
8.6

Very Good

Our Rating
10

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.
8.4

Good

Our Rating

9.5
Simple to use

9.3
worth the money

8.0
dispense easily

10 Best additives of 2026

1

Prolube Oil Treatment - Engine Oil Additive for Gas & Diesel Engines - Reduces Wear, Noise, Vibration - Boosts Fuel Economy & Horsepower - Works on Transmissions & Differentials (1QT)

How do we rank?

How do we rank?

Analyzing top stores

2

LIQUI MOLY Oil Additive Cera Tec 20002 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance, Less Friction & Lower Fuel Consumption 300 ml

9.5

9.3

9.3

3

Oxyfresh Premium Pet Dental Care Solution Pet Water Additive: Best Way to Eliminate Bad Dog Breath and Cat Bad Breath - Fights Tartar & Plaque - So Easy, Just Add to Water! Vet Recommended 16 oz.

9.5

8.9

8.7

4

Oxyfresh Premium Pet Dental Care Solution Pet Water Additive: Best Way to Eliminate Bad Dog Breath and Cat Bad Breath - Fights Tartar & Plaque - So Easy, Just Add to Water! Vet Recommended 16 oz.

9.5

8.9

8.7

5

STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors and Injectors, Fixes Rough Running Engines, Eliminates Water, Treats Up to 20 Gallons, 8oz (22304) , Green

9.9

9.7

9.1

6

STA-BIL Fast Fix - Small Engine Treatment, Cleans Carburetors and Injectors, Fixes Rough Running Engines, Eliminates Water, Treats Up to 20 Gallons, 8oz (22304) , Green

9.9

9.7

9.1

7

A Consumer's Guide to Toxic Food Additives: How to Avoid Synthetic Sweeteners, Artificial Colors, MSG, and More

9.9

9.7

9.5

8

Hot Shot's Secret EDT+ Winter Defense, 7-in-1 Anti-Gel Diesel Fuel Additive, Prevents Gelling, Protects Diesel Fuel System, Diesel Additive Improves Cold Start, Boosts Cetane, 16oz, Packaging May Vary

9

Hot Shot's Secret EDT+ Winter Defense, 7-in-1 Anti-Gel Diesel Fuel Additive, Prevents Gelling, Protects Diesel Fuel System, Diesel Additive Improves Cold Start, Boosts Cetane, 16oz, Packaging May Vary

10

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

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