
Redex Diesel Additive is a fuel system cleaner that claims to improve fuel efficiency, smoothen engine operation, and extend engine life. It is designed to clean essential components of the fuel system, specifically the injectors, by reducing the buildup of deposits. The additive also helps to lower emissions and improve fuel economy. Redex is the leading diesel fuel additive in the UK and has been trusted by motorists for over a century. It is safe to use and will not damage the engine even if added in incorrect quantities. However, some users have questioned its effectiveness, suggesting that using premium fuel or other products might be a better alternative. So, does it work?
| Characteristics | Values |
|---|---|
| Purpose | To clean the fuel system and improve fuel efficiency |
| Usage | Added to the fuel tank with every fill-up or as per instructions |
| Compatibility | Petrol Redex for petrol vehicles and Diesel Redex for diesel vehicles |
| Benefits | Improved engine performance, smoother engine operation, improved fuel economy, reduced emissions, extended engine life |
| Results | Varying experiences, some users report improved mileage and engine performance, while others find it unnecessary with premium fuel |
| Safety | Safe to use, even if added accidentally, does not damage the engine |
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What You'll Learn
- Redex Power Booster improves car power and maximises performance
- Redex Lead Replacement protects classic engines from corrosion
- Redex DPF Cleaner clears soot build-up and prevents blockage
- Redex Diesel System Cleaner ensures essential fuel system components are clean, specifically injectors
- Redex is safe to use with E10 fuel

Redex Power Booster improves car power and maximises performance
Redex Power Booster is a fuel additive designed to improve your car's power and maximise its performance. It is available for both petrol and diesel engines and can be added whenever you fill up your tank.
The Power Booster works by increasing the cetane/octane rating of the fuel, resulting in improved engine performance. Regular use of Redex diesel additives has been shown to lead to noticeable improvements in engine performance, making it a popular choice among drivers who want to keep their vehicles in top condition.
One of the key benefits of using Redex Power Booster is its ability to clean the fuel system. Over time, deposits and dirt can build up in the fuel injectors, leading to reduced engine efficiency. Redex additives help to remove these deposits, ensuring that the essential components of the fuel system, such as the injectors, remain clean. This, in turn, can lead to improved fuel efficiency and extended engine life.
In addition to improving engine performance and fuel efficiency, Redex Power Booster can also provide other benefits. Some users have reported an increase in mileage per tank after using Redex, with their cars running quieter and being more responsive. For older cars, Redex can also help protect the engine from corrosion and keep the fuel system in good condition.
While some may question the effectiveness of fuel additives, Redex has been a trusted brand for motorists for over a century. It is designed to be easy to use, with clear labelling indicating the correct dosage for different fuel tank sizes. Furthermore, Redex has been tested to four times the recommended dose without causing any harm to the engine.
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Redex Lead Replacement protects classic engines from corrosion
Redex Lead Replacement is a fuel additive designed to protect classic engines from corrosion. It is added to the fuel tank to clean the system and protect the engine from damage caused by using unleaded petrol in a car designed to use leaded petrol. This is a common issue for classic cars, as leaded petrol has been largely discontinued for environmental reasons.
Redex Lead Replacement lubricates soft valve seats, protecting them from damage and ensuring that the engine runs smoothly and reliably. It is formulated specifically for classic vehicles, with Redex claiming that it has been developed and extensively tested to ensure it provides all the performance benefits without causing any damage. The product has received generally positive reviews, with customers reporting that it helps maintain older engines and improves engine performance.
The dosage of Redex Lead Replacement is 2.5ml per litre of fuel, and it is recommended for use in every tank of petrol. It is important to note that Redex products are designed for specific types of fuel, so it is recommended to only use petrol Redex products for petrol vehicles and diesel Redex products for diesel vehicles.
Redex offers a range of other fuel additives, including the Redex Power Booster, which can be used in both petrol and diesel engines to improve the car's power and maximise performance. The Redex DPF Cleaner is another product designed to clear soot build-up and prevent blockages in the car's DPF system, reducing the stress of the warning light coming on during a drive.
Overall, Redex Lead Replacement is a specialist fuel additive designed to protect classic engines from corrosion and damage caused by the use of unleaded petrol. It is recommended for use in every tank of petrol to ensure the optimal performance and longevity of classic vehicles.
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Redex DPF Cleaner clears soot build-up and prevents blockage
Redex is a fuel additive that has been trusted by motorists for over a century. It is the UK's leading diesel fuel additive, offering a range of products designed to keep diesel engines in top condition. One of their key products is the Redex DPF Cleaner, which is specifically designed to address issues related to soot build-up in diesel engines.
The Redex DPF Cleaner is formulated to help clear soot build-up and prevent blockage in the diesel particulate filter (DPF). This filter is present in diesel cars manufactured after 2009, and it can become clogged with soot over time. The DPF Cleaner works in two ways: it promotes a cleaner burn during the combustion process, resulting in less soot accumulation, and it also lowers the burn-off temperature of any soot present, making it easier to eliminate.
By using the Redex DPF Cleaner every 2-3 tanks or when the DPF warning light illuminates, diesel car owners can effectively manage soot build-up. This not only prevents blockages but also reduces the stress of dealing with a warning light mid-drive. The product is safe to use, and even if you accidentally add more than the recommended dose, it won't harm your engine.
The benefits of using Redex DPF Cleaner extend beyond just soot management. Regular use of Redex diesel additives can lead to noticeable improvements in engine performance. They help ensure a smoother engine operation, improved fuel economy, and reduced emissions. Additionally, by reducing the build-up of deposits in the fuel injectors, Redex additives can extend the engine's life and enhance fuel efficiency.
While some people may question the effectiveness of fuel additives, Redex has been proven to deliver positive results. Some car owners have reported improvements in mileage and throttle responsiveness after using Redex. For example, a user on Reddit shared that after using Redex in their car, they experienced an increase in their car's range from 320 to 490, indicating improved fuel efficiency.
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Redex Diesel System Cleaner ensures essential fuel system components are clean, specifically injectors
Redex Diesel System Cleaner is designed to ensure essential fuel system components are clean, with a specific focus on injectors. It is added to the fuel tank to clean the system, and it targets different parts to solve specific problems.
The product is designed to clear debris and blockages from the fuel injectors, ensuring maximum efficiency in the engine's cylinders during the combustion cycle. This, in turn, helps to improve fuel efficiency and engine performance. Regular use of Redex Diesel System Cleaner can lead to noticeable improvements in engine performance, making it a popular choice among drivers seeking to maintain their vehicles in top condition.
Redex has been a trusted brand for motorists for over a century, and it is the UK's leading diesel fuel additive. It is designed to be easy to use, with clear labelling that instructs users on how much of the bottle to use for different fuel tank sizes. For example, the 250ml diesel system cleaner treats two tanks, so users can add half the bottle each time they fill up with fuel.
While some people have questioned the effectiveness of Redex, there are testimonials that suggest it has improved their vehicle's performance. One user noted that after using Redex in their car, they experienced improved mileage per tank and a quieter, more responsive engine. Another user reported that Redex helped clear up a flat spot in their car's performance at 2250rpm.
It is important to note that Redex is designed for diesel vehicles, and using the wrong fuel additive will not damage the engine, but it will also not work properly as the formulas for each type of fuel are different.
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Redex is safe to use with E10 fuel
Redex is a fuel additive that can be added to a fuel tank to clean the system. It is designed to be easy to use, with clear labelling telling users how much of the bottle to use in different fuel tank sizes. The product is safe to use and will not damage the engine, even if you add too much.
Redex offers a range of products, including the Redex Power Booster, which can be used whenever you fill up the tank to improve your car's power and maximise performance by increasing the cetane/octane rating. Another product is the Redex Lead Replacement, which is designed to protect classic car engines from corrosion.
All Redex petrol fuel additives are safe to use with E10 fuel. E10 contains more ethanol than the outgoing E5 blend, but this does not affect the way Redex additives work. The Redex Petrol System Cleaner, for example, is compatible with both E10 and E5 petrol and can be used in hybrid vehicles. It has been redeveloped to provide an additional layer of protection to prevent corrosion from the increased ethanol content found in E10 petrol. This means that with the addition of one shot of Redex Petrol System Cleaner in each tank, any vehicles manufactured before 2011 can still use E10 petrol safely.
Redex can be used in all combustion engines, including diesel engines and wet clutch motorcycle engines. It is important to note that Redex should not be poured down the spark plug holes but rather poured directly into the fuel tank.
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Frequently asked questions
Yes, Redex diesel fuel additives have been trusted by motorists for over a century. The additives improve fuel efficiency and are designed to clean the fuel system, specifically the injectors, to ensure smoother engine operation.
Redex diesel additives are added to the fuel tank. Redex provides clear labelling on its bottles, indicating how much of the bottle to use in different fuel tank sizes.
Redex DPF Cleaner should be used every 2-3 tanks or when the DPF warning light comes on. Redex Power Booster can be used whenever you fill up the tank.
Yes, Redex diesel fuel additives are safe to use. Even if you accidentally add more than the recommended dose, Redex has been tested to four times the recommended dose without causing any harm.
Yes, there are other fuel additive products available, such as Millers Diesel EcoMax and Wynns Eco Diesel. Some people also choose to use premium fuel or lubricating additives instead of Redex.










































