10 bestFuel Additivesof July 2026
112M consumers helped this year.
1
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
9.9
37% off
2
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
9.8
3
Redline (60103-12PK) Complete SI-1 Fuel System Cleaner - Gas and Injector Additive Treatment (12 PK Case)
Red Line
9.6
4
Archoil AR6900-D Max Advanced Diesel Additive Concentrate, 1L Treats 1,000L of Fuel, Diesel Fuel Injector Cleaner, DPF Filter EGR Valve Turbo Cleaner, Super Diesel Converter. (1Litre)
Archoil
9.3
14% off
5
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
9.1
OtherUp to 9% off
Archoil AR6900-P Max Advanced PETROL Fuel Additive Concentrate, 1L Treats 1,000L of Fuel, Petrol Injector Cleaner, GPF Turbo EGR Valve Cleaner, Super Unleaded Convertor (1Litre)
Wynn's High Performance Diesel Fuel System Treatment - Enhances Combustion, Improves Acceleration, Reduces Fuel Consumption & Black Smoke - 500ml
Oilsyn CarbonCode Diesel Dr Complete Fuel System, Injector & Engine Cleaner. Multiple Detergent Tech with Max Strength Polyetheramine. Up to 10 Point Cetane Increase. (5 Litres)
Millers Oils 2 X Diesel Power Ecomax 500ml, Fuel Additive Treatment
6
STP Ultra 5 in 1 Petrol 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
7
Wynn's Extreme Diesel System Cleaner - Deep Cleaning Engine Treatment - Restores Fuel Economy & Reduces Emissions - Prevents Turbo, EGR Valve & DPF Issues - 325ml
Wynn's
8.5
18% off
8
Wynn's Diesel Particulate Filter Cleaner - Cleans & Regenerates Blocked DPF Soot Filters - Reduces Soot Formation & Emissions - Compatible with Diesel & Hybrid Diesel up to B30-325ml
Wynn's
8.2
9
Wynn's Diesel Power 7 Complete Action Fuel Additive Optimises Engine Performance 1L
Wynn's
7.9
21% off
10
STP Petrol Fuel System Cleaner 400ml, Fuel Injector Cleaner Additive for Petrol Cars, Engine Performance & Reduces Emissions, Suitable For Hybrids
STP
7.7
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