10 bestDiesel Fuel Additiveof May 2025
112M consumers helped this year.
5% off
1
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
19% off
2
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
Redex
9.6
12% off
3
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
9.4
4
Cataclean Diesel | Complete Fuel & Exhaust Cleaner | Catalytic Converter, Valve & Injector Cleaner | Fuel Additive Formulated for Performance & Fuel Efficiency | Pre MOT Emissions Reducer | 2 x 500ml
Cataclean
9.2
5
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
9.0
OtherUp to 33% off
STP Diesel Particulate Filter Cleaner 200 ml, Cleans and Protects Your Filter by Removing Soot in One Treatment, Restores Power and Acceleration, Mechanical Car Cleaning Products, Made in the UK
STP Diesel Fuel Additive Twin Pack
Wynn's Professional Formula Extreme Diesel Injector Cleaner Fuel System Additive 500ml
Wynn's Formula Gold High Performance Diesel System Treatment 500ml
21% off
6
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
8.7
7
Wynn's Extreme Diesel System Fuel Injector Cleaner Engine Additive Treatment 325ml
Wynn's
8.5
15% off
8
Wynn's Diesel Particulate Filter Cleaner Fuel Additive DPF Regenerator Treatment
Wynn's
8.2
9
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
8.0
11% off
10
2 x Liqui Moly Diesel Particulate Filter Protector DPF Cleaner Regenerator 250ml
Liqui Moly
7.7
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A Guide to Selecting the Best Diesel Fuel Additive
Choosing the right diesel fuel additive can significantly enhance the performance and longevity of your diesel engine. Diesel fuel additives are chemical compounds that are added to diesel fuel to improve its quality and efficiency. They can help in cleaning the engine, improving fuel economy, reducing emissions, and preventing fuel system corrosion. When selecting a diesel fuel additive, it's important to consider the specific needs of your vehicle and the conditions in which it operates. Understanding the key specifications of diesel fuel additives will help you make an informed decision that aligns with your vehicle's requirements and your driving habits.
Cetane Improver
Cetane improvers are additives that increase the cetane number of diesel fuel, which is a measure of the fuel's ignition quality. A higher cetane number means the fuel ignites more quickly and burns more completely, leading to better engine performance, smoother operation, and reduced emissions. Cetane numbers typically range from 40 to 55. If you drive a high-performance vehicle or operate in cold climates where ignition can be challenging, a higher cetane number may be beneficial. For regular driving conditions, a moderate cetane improvement is usually sufficient.
Lubricity Enhancer
Lubricity enhancers are additives that improve the lubricating properties of diesel fuel, which is crucial for protecting the fuel injection system and other engine components from wear and tear. Diesel fuel with low lubricity can cause increased friction and damage to engine parts. If your vehicle operates in harsh conditions or uses ultra-low sulfur diesel (ULSD), which naturally has lower lubricity, a lubricity enhancer can be particularly important. Choose an additive that provides adequate lubrication to ensure the longevity of your engine components.
Fuel Stabilizer
Fuel stabilizers are additives that prevent the degradation of diesel fuel over time, which can lead to the formation of gum and varnish deposits in the fuel system. This is especially important if your vehicle is not used frequently or is stored for extended periods. Fuel stabilizers help maintain fuel quality and ensure reliable engine starts after storage. If you plan to store your vehicle or equipment for a long time, selecting an additive with strong stabilizing properties is advisable.
Anti-Gel Additive
Anti-gel additives are designed to prevent diesel fuel from gelling in cold temperatures, which can clog fuel lines and filters, leading to engine starting problems. These additives lower the pour point and cold filter plugging point of diesel fuel, ensuring smooth flow even in freezing conditions. If you live in or travel to areas with cold winters, an anti-gel additive is essential to keep your diesel engine running smoothly. For milder climates, this may not be as critical.
Detergent Additive
Detergent additives help clean the fuel system by removing deposits and preventing new ones from forming. This can improve engine performance, fuel efficiency, and reduce emissions. Over time, deposits can build up in the fuel injectors and combustion chamber, leading to reduced engine efficiency. If you notice a decrease in performance or fuel economy, or if your vehicle is older, a detergent additive can be beneficial. Regular use can help maintain a clean fuel system and optimal engine performance.
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