10 Best diesel fuel additives of 2026

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1

Clicked 3 times in the last month

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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Value for Money

2

Power Service
Power Service 1025-12PK +Cetane Boost Diesel Fuel Supplement Anti-Freezer - 1 Quart, (Pack of 12)
Main highlights

Fuel Gelling Prevention
Prevents fuel gelling and protects against fuel-filter icing in extreme cold.

Ideal for Cold Climates
Perfect for diesel engines operating in sub-zero temperatures and harsh conditions.

Reliable Cold Start
Customers praise its effectiveness in ensuring reliable cold starts and preventing breakdowns.
9.7

Exceptional

Our Rating

9.9
worth the money

9.9
Temperature control

9.5
For traveling
3

Hot Shot's Secret
Hot Shot's Secret Everyday Diesel Treatment (HSSEDT16ZS) 6-in-1 Diesel Fuel Additive - Treats 400 Gallons, Diesel Injector Cleaner, Diesel Fuel System Cleaner, Diesel Additive Boosts Cetane, 16oz
Main highlights

Boosts Performance and Efficiency
Increases cetane up to 7 points, improving fuel economy and engine maintenance.

Ideal for Diesel Engines
Perfect for diesel engines needing protection from low sulfur fuel issues.

Quick Start Improvement
Most users notice faster engine starts and smoother running.
9.4

Excellent

Our Rating

9.5
Simple to use

9.1
worth the money

9.1
distance
4

Hot Shot's Secret
Hot Shot's Secret Everyday Diesel Treatment (HSSEDT16ZS) 6-in-1 Diesel Fuel Additive - Treats 400 Gallons, Diesel Injector Cleaner, Diesel Fuel System Cleaner, Diesel Additive Boosts Cetane, 16oz
Main highlights

Boosts Performance and Efficiency
Increases cetane up to 7 points, improving fuel economy and engine maintenance.

Ideal for Diesel Engines
Perfect for diesel engines needing protection from low sulfur fuel issues.

Quick Start Improvement
Most users notice faster engine starts and smoother running.
9.1

Excellent

Our Rating

9.5
Simple to use

9.1
worth the money

9.1
distance
5

Power Service
Power Service Diesel Fuel Supplement +Cetane Boost - 12 Ounce (Pack of 9)

19% Off
Main highlights

Fuel Protection and Performance
Prevents fuel gelling, protects against icing, boosts cetane for faster cold starts.

Versatile Cold Weather Solution
Ideal for all diesel fuels, including ULSD and biodiesel blends, in cold conditions.

Customer Praised Lubrication
Contains Slickdiesel Lubricator for superior fuel pump and injector protection.
9.0

Excellent

Our Rating
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6

Power Service

Power Service Diesel Fuel Supplement +Cetane Boost - 64 Ounce (Pack of 6)

24% Off
8.9

Very Good

Our Rating
7

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
8.8

Very Good

Our Rating
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

Power Service
Power Service Diesel Fuel Supplement +Cetane Boost - 26 Ounce (Pack of 12)

40% Off
Main highlights

Boosts Cetane for Faster Cold Starts
This additive enhances cetane levels, ensuring quicker engine starts in cold weather, and prevents fuel gelling and filter icing.

Ideal for Winter Diesel Engine Use
Best suited for all diesel engines, especially during cold winter months, to maintain optimal performance and prevent common cold-weather issues.

Highly Recommended for Winter Use
Customers frequently praise its effectiveness in cold weather, often returning to this product after trying other brands.
Key specs
- product dimensions:2.5 x 3.7 x 9.7 inches
- fuel type:Diesel
- item size:1.7 pounds
- special features:Boosts cetane, prevents gelling
- package dimensions:N/A
8.4

Good

Our Rating

9.9
Temperature control

9.7
safety

9.5
worth the money
10

Lucas Oil
Lucas Oil 10866 Anti-Gel Cold Weather Diesel Additive - 64 fl. oz.
Main highlights

Key Features and Benefits
Removes moisture, lowers cold filter plugging point, prevents fuel thickening/gelling, safe for diesel particulate filters.

Ideal Use Cases
Perfect for ULSD and biofuel users in cold climates, ensuring smooth operation and preventing fuel system issues.

Customer Reviews Summary
Most praised for effectively preventing fuel gelling and improving winter fuel performance.
8.2

Good

Our Rating

9.9
distance

8.9
worth the money

10 Best diesel 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

Power Service 1025-12PK +Cetane Boost Diesel Fuel Supplement Anti-Freezer - 1 Quart, (Pack of 12)

9.9

9.9

9.5

3

Hot Shot's Secret Everyday Diesel Treatment (HSSEDT16ZS) 6-in-1 Diesel Fuel Additive - Treats 400 Gallons, Diesel Injector Cleaner, Diesel Fuel System Cleaner, Diesel Additive Boosts Cetane, 16oz

9.5

9.1

9.1

4

Hot Shot's Secret Everyday Diesel Treatment (HSSEDT16ZS) 6-in-1 Diesel Fuel Additive - Treats 400 Gallons, Diesel Injector Cleaner, Diesel Fuel System Cleaner, Diesel Additive Boosts Cetane, 16oz

9.5

9.1

9.1

5

Power Service Diesel Fuel Supplement +Cetane Boost - 12 Ounce (Pack of 9)

6

Power Service Diesel Fuel Supplement +Cetane Boost - 64 Ounce (Pack of 6)

7

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

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

Power Service Diesel Fuel Supplement +Cetane Boost - 26 Ounce (Pack of 12)

9.9

9.7

9.5

10

Lucas Oil 10866 Anti-Gel Cold Weather Diesel Additive - 64 fl. oz.

9.9

8.9

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