10 Best Diesel Additives For Improved Engine Performance A Comprehensive Comparison

10 Best diesel additives for improved engine performance a comprehensive comparison - December 2025

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Last Updated: 15-12-2025

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Wynn's Diesel Power 7 Complete Action Fuel Additive Optimises Engine Performance 1L

Wynn's

9.8

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10% Off

Wynn's Diesel Particulate Filter Cleaner - Heavy-Duty Cleaning for Severely Blocked DPFs - Restores Optimal Pressure Levels & Engine Performance - Biodegradable Formula - 5L

Wynn's

9.6

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Best value

Powerenhancer Premium Double Filtered Pure 2-EHN Cetane Booster with 100% Ester Lubricant. Diesel Additive to Improve Cold Start, Reduce Engine Knock and Improve Performance. 4 x 220ml

Powerenhancer

9.5

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Powerenhancer Premium Double Filtered Pure 2-EHN, 2-Ethyl-Hexyl Nitrate Cetane Booster. Diesel Additive to Improve Cold Start, Reduce Engine Knock, Improve Performance & Fuel Economy. 4 x 220ml

Powerenhancer

9.2

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26% Off

STP Diesel Fuel Additive Treatment Bundle, Includes Diesel Injector Cleaner and Ultra 5-in-1 Diesel System Cleaner, Cleans Injectors and Restores Performance For A Smoother Engine, Made in the UK

STP

9.1

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47% Off

STP Ultra 5 in 1 Diesel Fuel System Cleaner 400ml , Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

STP

8.8

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Redex Diesel Fuel System Cleaner 500ml, Diesel Additives To Remove Harmful Emissions, Maximise Performance & Increase Fuel Economy With Redex Fuel Additives For Diesel Engines, Suitable For Hybrids

Redex

8.6

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26% Off

Redex Diesel Booster, Diesel Additives To Boost Cetane Number, Maximise Performance & Increase Fuel Economy With Redex Diesel Fuel Additive, Boost Diesel Engine Performance & Improve Power, 250ml

Redex

8.4

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14% Off

STP Diesel High Milage Injector Cleaner 200 ml, Cleans and Protects your Engine for 300 miles, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

STP

8.2

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Redex Diesel Fuel System Cleaner 250ml, Diesel Additives To Remove Harmful Emissions, Maximise Performance & Increase Fuel Economy With Redex Fuel Additives For Diesel Engines, Suitable For Hybrids

Redex

8.1

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Wynn's Diesel Power 7 Complete Action Fuel Additive Optimises Engine Performance 1L

Wynn's Diesel Particulate Filter Cleaner - Heavy-Duty Cleaning for Severely Blocked DPFs - Restores Optimal Pressure Levels & Engine Performance - Biodegradable Formula - 5L

Powerenhancer Premium Double Filtered Pure 2-EHN Cetane Booster with 100% Ester Lubricant. Diesel Additive to Improve Cold Start, Reduce Engine Knock and Improve Performance. 4 x 220ml

Powerenhancer Premium Double Filtered Pure 2-EHN, 2-Ethyl-Hexyl Nitrate Cetane Booster. Diesel Additive to Improve Cold Start, Reduce Engine Knock, Improve Performance & Fuel Economy. 4 x 220ml

STP Diesel Fuel Additive Treatment Bundle, Includes Diesel Injector Cleaner and Ultra 5-in-1 Diesel System Cleaner, Cleans Injectors and Restores Performance For A Smoother Engine, Made in the UK

STP Ultra 5 in 1 Diesel Fuel System Cleaner 400ml , Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

Redex Diesel Fuel System Cleaner 500ml, Diesel Additives To Remove Harmful Emissions, Maximise Performance & Increase Fuel Economy With Redex Fuel Additives For Diesel Engines, Suitable For Hybrids

Redex Diesel Booster, Diesel Additives To Boost Cetane Number, Maximise Performance & Increase Fuel Economy With Redex Diesel Fuel Additive, Boost Diesel Engine Performance & Improve Power, 250ml

STP Diesel High Milage Injector Cleaner 200 ml, Cleans and Protects your Engine for 300 miles, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

Redex Diesel Fuel System Cleaner 250ml, Diesel Additives To Remove Harmful Emissions, Maximise Performance & Increase Fuel Economy With Redex Fuel Additives For Diesel Engines, Suitable For Hybrids

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