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10 Best Diesel Additives in The UK

Last updated on 07/07/2025

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WOL Diesel Additive Injector Cleaner Liqui Moly Super Diesel Additive 250ml - Fuel System Cleaner - DPF Cleaner Diesel 1806 - Diesel Particulate Filter Cleaner (3 UNIT)

Why We Love It

Restores engine performance effectively.
Cleans and lubricates fuel system.
Reduces emissions and fuel consumption.

Main Highlights

DIESEL FUEL SYSTEM CLEANER Improves fuel stability and reduce diesel emission and restore engine performance. Also help to keep both the injectors and fuel system clean and efficient.
REMOVES ALL TYPES OF DEPOSITS and contaminations and removes moisture from the fuel system. Cleans injector nozzles, inlet valves and combustion chamber. Increase performance and prolonged life span creating the most benefits from your car.
RESTORES ENGINE POWER and reduces fuel consumption. Also forms ceramic anti-wear coating on the fuel equipment parts. Help to lubricate the pumps and injectors and compensate for the reduced lubrication of low sulphur diesel.
DIESEL INJECTOR CLEANER AND FUEL STABILIZER cleans and restores diesel particulate filters and hastens the speed of soot burn-out, eliminating high temperature requirements.
CAR CARE This Diesel fuel additive is specialized fuel injector cleaner, carbon deposit remover, fuel lubricant and stabilise diesel fuel that guarantees low fuel consumption with high wear resistance.

LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1

10% OffFree Shipping

Why We Love It

Smoother engine performance guaranteed.
Certified effectiveness with TÜV Thüringen.
Extends engine's lifespan significantly.

Main Highlights

SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high thermal resilience. Additive ensures smoother-running engine, extending the engine’s lifespan. Can be used with manual & automatic transmissions. Not suitable for use with wet clutches.
LOWER FUEL CONSUMPTION and diminished emission of pollutants due to smoother engine operation.
EASY TO ADD DURING OIL CHANGES: The 300 ml bottle is sufficient for up to 5 liters of engine oil. Shake well before use and add to fresh oil. Can be mixed with all gear & engine oils on the market. Long-lasting performance, up to 50,000 km.
CERTIFIED EFFECTIVENESS proven by TÜV Thüringen: Chemical components in Cera Tec smooth out rough surfaces, the ceramic particles fill in uneven surface imperfections. Prevents direct contact of all metal parts, reducing friction and wear & tear. Turbo & Cat tested.
EVERYTHING THAT DRIVES WORKS BETTER WITH LIQUI MOLY: We manufacture over 4,000 products: engine oils, additives, vehicle care, chemical servicing and repair, adhesives and sealing products. Our products are currently distributed to over 150 countries worldwide. They are popular everywhere, ensuring a superior driving experience and improved engine performance.

STP Diesel Fuel Additive Twin Pack

23% Off

Why We Love It

Cleans and restores performance.
Lowers exhaust emissions.
Reduces rough idling.

Main Highlights

STP Diesel Bundle contains STP Diesel Injector Cleaner 200ml and STP Ultra 5-in-1 Diesel System Cleaner 400ml
Cleans & Unclogs: Powerful STP Diesel Injector Cleaner clears dirty injectors with just one treatment
Restores Performance: STP Ultra 5-in-1 System Cleaner is our most advanced diesel formula, helping to remove deposits and clear dirty injectors
Lowers Emissions: A cleaner engine may mean less exhaust emissions and lower fuel consumption
For All Diesel Engines: Suitable for all diesel engines including DI, IDI and common rail, and catalytic converters
Quick & Easy: Simply pour the entire bottle of STP Diesel Injector Cleaner or STP Diesel System Cleaner into a full tank
Reduces Rough Idling: For a smoother engine experience

Millers Oils Diesel Power Ecomax Fuel Additive Treatment 500ml 0.5L NEW IMPROVED

Nitrox Max Blast Diesel Fuel System Additive, 300ml

Free Shipping

Why We Love It

Cleans and protects system.
Restores lost power quickly.
Boosts car performance instantly.

Main Highlights

MULTI-PURPOSE FORMULA: Contains technically advanced additives specially designed to clean, protect, and detox your entire system
RESTORE LOST POWER: The powerful formulation will help to restore lost power and acceleration in one quick max blast!
GIVE YOUR CAR A NEW LEASE OF LIFE: Suitable for older or high mileage vehicles
BOOST PERFORMANCE: Restore your car's original performance and increase acceleration almost immediately
RESTORES KEY ENGINE PARTS: Once added to the fuel tank the detoxification process begins cleaning and restoring key engine parts, such as injector valves, pistons, intake manifolds, cylinder heads and combustion chambers

Wynn's High-Performance Diesel Fuel System Treatment - Formula Gold Improves Engine Combustion & Acceleration - Reduces Fuel Consumption - Safe for All Diesel Engines - 500ml

Free Shipping

Why We Love It

Improves engine performance instantly.
Lowers fuel consumption efficiently.
Reduces harmful emissions effectively.

Main Highlights

✅ IMPROVES COMBUSTION FOR BETTER PERFORMANCE AND ACCELERATION: Designed to immediately enhance combustion, this high-performance diesel fuel system treatment improves the way in which fuel burns inside the engine. By promoting a more complete and efficient combustion process, it leads to improved throttle response and smoother acceleration. This results in a more dynamic driving experience, reducing hesitation and engine lag. Additionally, a more efficient burn reduces engine noise, making diesel engines operate more quietly and smoothly
✅ REDUCES FUEL CONSUMPTION FOR COST-EFFECTIVE DRIVING: By ensuring a cleaner and more efficient fuel system, this treatment helps lower fuel consumption. Deposits and impurities inside the fuel injectors can hinder proper fuel atomisation, leading to increased fuel usage. This advanced formula dissolves and prevents these deposits, allowing the engine to run at optimal efficiency, which translates into noticeable fuel savings. For frequent drivers or those looking to maximise fuel economy, this treatment provides a practical and effective solution to get the most mileage out of every tank.
✅ LOWERS HARMFUL EMISSIONS FOR A CLEANER EXHAUST SYSTEM: Designed to actively reduce carbon monoxide (CO) and hydrocarbon (HC) emissions, this diesel treatment contributes to cleaner exhaust gases. By promoting a more complete fuel burn, it significantly lowers unburned fuel residues that are released into the environment. This makes it particularly beneficial for vehicles undergoing emission testing or MOT inspections, helping engines comply with stricter environmental standards. The reduction of black smoke is another key advantage, improving air quality and making diesel engines more eco-friendly.
✅ CLEANS AND PROTECTS THE FUEL INJECTION SYSTEM FOR LONG-TERM ENGINE HEALTH: A clean fuel system is essential for optimal engine performance. This diesel fuel system treatment thoroughly cleans fuel injectors, preventing clogging and removing deposits that can lead to inefficiencies. By maintaining a clean injection system, fuel delivery is more precise, ensuring proper combustion and reducing engine wear. Additionally, the protective formula helps shield the fuel system from oxidation and corrosion, prolonging the lifespan of critical components.
✅ SAFE FOR ALL DIESEL ENGINES AND AFTER-TREATMENT SYSTEMS: Formulated to be completely safe for all modern and older diesel engines, this treatment is compatible with common-rail and direct-injection diesel systems. It does not harm after-treatment systems such as diesel particulate filters (DPF) or catalytic converters. The anti-corrosion properties help prevent rust and deposit buildup in the fuel system, ensuring long-term engine health. For best results, it is recommended to use this additive in every third tank of fuel.

Millers Oils 2 X Diesel Power Ecomax 500ml, Fuel Additive Treatment

Why We Love It

Boosts vehicle performance significantly.
Ensure cleaner, efficient combustion.
Reliable brand in auto accessories.

Main Highlights

Millers Oils 2 X Diesel Power Ecomax 500ml Fuel Additive Treatment
Brand : Millers Oils
Product type: AUTO ACCESSORY

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

5% Off

Why We Love It

Boosts fuel system cleaning.
Recovers peak engine performance.
Offers superior engine protection.

Main Highlights

What You'll Get - 400 ml Diesel Fuel System Cleaner
Concentrated Cleaning Power - Cleans and conditions the entire fuel delivery system in one tank
Restores Power and Performance - Recovers peak engine performance by removing harmful deposits
Protects Your Engine - Reduces friction and protects key engine parts from wear and corrosion
Reduces Diesel consumption and exhaust emissions - promotes better fuel economy

Wynn's High Performance Diesel Fuel System Treatment - Enhances Combustion, Improves Acceleration, Reduces Fuel Consumption & Black Smoke - 500ml

12% OffFree Shipping

Why We Love It

Improves engine performance instantly.
Reduces fuel consumption effectively.
Protects against oxidation.

Main Highlights

✅ IMPROVES COMBUSTION FOR OPTIMAL ENGINE PERFORMANCE: This high-performance diesel treatment is formulated to enhance combustion efficiency immediately upon use. The powerful blend of active ingredients optimises the fuel-to-air ratio, allowing for a cleaner and more complete burn inside the engine. As a result, the engine runs more smoothly and efficiently, leading to improved throttle response and faster acceleration. Enhanced combustion also contributes to a reduction in harmful emissions and particulate matter, resulting in a cleaner exhaust. This makes it particularly effective for vehicles that operate under demanding conditions, where peak engine performance is essential.
✅ REDUCES FUEL CONSUMPTION FOR COST-EFFICIENT DRIVING: By promoting more complete combustion, this treatment directly contributes to a reduction in fuel consumption. It maximises the energy extracted from each litre of diesel, helping the engine to deliver better mileage without compromising performance. Whether used in long-distance driving or frequent short trips, this product supports fuel efficiency by optimising the way diesel is burned. The result is lower fuel costs over time and less frequent refuelling. Regular application helps maintain this improved fuel economy, making it a smart choice for fuel-conscious drivers and fleet operators alike.
✅ REDUCES BLACK SMOKE FOR CLEANER EMISSIONS: This advanced diesel system treatment addresses one of the most visible signs of inefficient fuel use: black smoke. By improving the combustion process, the treatment drastically reduces unburned hydrocarbons that manifest as dark exhaust. This contributes not only to a cleaner vehicle but also to a more environmentally friendly operation. Vehicles treated with this formula emit noticeably less smoke, which can be a critical factor in passing emission tests or complying with urban environmental regulations.
✅ PROTECTS THE FUEL SYSTEM FROM OXIDATION AND CORROSION: The formula includes special additives designed to shield the fuel system from the damaging effects of oxidation and corrosion. Diesel engines are particularly susceptible to water contamination and fuel degradation, which can lead to rust, corrosion, and the formation of sludge within the fuel tank and injection system. This treatment provides a protective barrier that inhibits these processes, extending the lifespan of fuel components such as injectors, pumps, and lines. It is especially beneficial in vehicles that are not used regularly, where stagnant diesel may pose a greater risk.
✅ TREATS UP TO 70 LITRES WITH ONE 500ML BOTTLE: The concentrated nature of this formula ensures that a single 500ml bottle is sufficient to treat up to 70 litres of diesel fuel. This high-yield ratio makes it a cost-effective solution for those looking to maintain peak engine performance without frequent applications. Suitable for cars, vans, trucks, and other diesel-powered machinery, this treatment integrates seamlessly into routine maintenance schedules. Its easy-to-use format allows it to be poured directly into the fuel tank, ensuring fast action and visible results.

LIQUI MOLY Speed Tec Diesel | 250 ml | Diesel additive | SKU: 3722, k.A.

18% OffFree Shipping

Why We Love It

Optimized performance for driving pleasure.
Compatible with diesel filters.
Improved acceleration under partial load.

Main Highlights

This advanced fuel additive has been developed specifically to noticeably improve acceleration in the partial load range
For all diesel engines with and without diesel particle filters. Tested for turbo and catalytic converters Completely compatible with all conventional diesel and bio-diesel fuels. Excellent for continuous use at each refueling
Provides more driving pleasure through optimized performance yield
This highly modern fuel additive was specially developed to noticeably improve acceleration under partial load

8.7

Excellent

Save 18%

We scanned 1154 products

We reviewed these offers relevant to the Diesel Additives within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like WOL, Liqui Moly, STP, Millers Oils, Nitrox, Wynn's, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Diesel Additives in the market, we considered we took a deep dive into 5771 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is WOL Diesel Additive Injector Cleaner Liqui Moly Super Diesel Additive 250ml - Fuel System Cleaner - DPF Cleaner Diesel 1806 - Diesel Particulate Filter Cleaner (3 UNIT). We love many things about this product by WOL. What sets it apart from the competition is Restores engine performance effectively. , Cleans and lubricates fuel system. , Reduces emissions and fuel consumption. .
The best value product for most shoppers and where user satisfaction is continuously the highest is LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1 by Liqui Moly based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Diesel Additives and the best cost-to-value ratio is STP Diesel Fuel Additive Twin Packat STP with a 23% discount.
Our list of the best Diesel Additives is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Diesel Additives in The UK

Related Deals You Might Like for Diesel Additives

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 DPF Cleaner Diesel, DPF Diesel Particulate Filter Cleaner To Clear Soot Blockages Quickly & Avoid Costly Repairs, Hassle-Free DPF Cleaner To Prevent Clogging & Reduce Emissions, 250ml

Wynn's Extreme Diesel System Cleaner - Deep Cleaning Engine Treatment - Restores Fuel Economy & Reduces Emissions - Prevents Turbo, EGR Valve & DPF Issues - 325ml

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

LIQUI MOLY Diesel Particulate Filter Protector | 250 ml | Diesel additive | SKU: 7180, Gray

Archoil AR6900-D Max Advanced Diesel Additive Concentrate, 2 x 250ml Treats 500L of Fuel, Diesel Fuel Injector Cleaner, DPF Filter EGR Valve Turbo Cleaner, Super Diesel Converter. (2 x 250ml)

Liqui Moly 5120 Super Diesel Additive

Wynn's Total Action Diesel Cleaner – All-in-One Fuel and Exhaust System Cleaner – Protects Injectors, Valves, Turbo, DPF, EGR & Combustion Chamber – 325ml

Wynn's Crystal Clean & Protect - Additive for Use with AdBlue - Prevents Crystallisation in SCR Systems - Enhances Diesel Emission Control Performance - 125ml

Wynn's Diesel Turbo Cleaner - Removes Carbon Build-Up & Frees Sticking Vanes - Cleans Diesel Oxidation Catalyst & EGR Valve - Restores Engine Power & Reduces Soot Emissions - 500ml

We scanned 1154 products

We concluded that: