Redex System Cleaner

Does Redex Work? – Redex System Cleaner

So, does Redex work? A good system cleaner can help your car run further and keep your engine in prime condition. That’s why we’re excited to try out the Redex System Cleaner. We received 3 months’ worth of Redex to test out, which we’ll be using on a 2.2 litre Diesel Range Rover Evoque.

Redex System Cleaner

Redex System Cleaner

Just as you wouldn’t leave your car interior or bodywork dirty for months on end, you shouldn’t take liberties with your engine. Fuel economy can be reduced by the deposits which build up on your fuel injectors during combustion. This is a result of the varying fuel qualities available in the UK and the amount of additives they contain. The resulting build-up means that you’ll be paying more for fuel, as your injectors won’t be working as efficiently as they should.

Redex System Cleaner eradicates this deposit build-up. Regular use will keep the injectors in their best working condition, and save you money when driving.

We’ll be adding Redex to our Evoque every time we buy fuel for 3 months, and posting updates about how it’s working throughout.

Benefits Of A Fuel System Cleaning

Redex offers a premium brand solution to improve fuel economy. The cleaner, available for both petrol and diesel cars, promises to keep both your fuel consumption and emissions low. This means the product is not only great for your car, but great for the environment too.

The benefits extend beyond saving you money on fuel, though. This reduction of harmful emissions could mean your vehicle is a step closer to passing its MOT, meaning even less money is spent on repairs to make it roadworthy.

Redex System Cleaner will improve engine life and restore the best possible performance to your vehicle. It means cars can drive further on their fuel, and give you a healthy car on the inside. Better yet, Redex is the number 1 market leader in UK fuel additives.

Redex System Cleaner

A Range of Easy-To-Use Products

Redex doesn’t stop at petrol and diesel cars. The system cleaner is also available for hybrid vehicles, which burn similarly to petrol engines in terms of injector build-up. Additionally, Redex offers a range of other products, from Adblue, which helps reduce diesel car emissions by up to 80%, to Lead Replacement. The latter means you can use unleaded petrol in leaded cars, especially classic vehicles, so the engine receives the additives it needs. Using unleaded petrol in a leaded engine can inevitably lead to major problems – Redex eliminates that threat.

Redex System Cleaner is really simple to use. Just add 90ml of the cleaner to your fuel tank every time you refill the tank. If you haven’t used any fuel additives in a while, it’s a good idea to first add a double dose (180ml). This will clean the engine thoroughly before regular use.

Redex System Cleaner - adding

We’re excited to see the results of Redex System Cleaner on our Evoque. Remember to check back for our updates and review!

Update 2

For the past month, I have been testing Redex System Cleaner in a 2.2 litre Diesel Range Rover Evoque and I have been carefully monitoring the results and the benefits I have experienced from the product.

What Problem Does It Solve?

Redex is known to be good for maintaining your engine and removing deposits from fuel injectors. Fuel economy can be reduced by the deposits that build up on your fuel injectors during combustion, Redex System Cleaner eradicates this deposit build-up.

How Redex Helps

You add the Redex System Cleaner in to your fuel tank to mix with the petrol or diesel. The cleaner promises to keep both your fuel consumption and emissions low. This is achieved by removing the deposits as the fuel and Redex mix passes through the injectors.

Range Rover Redex Test

Used regularly Redex System Cleaner can improve engine life and restore the best possible performance to your vehicle. It could mean cars can drive further on their fuel, and give a healthier car on the inside.

Does Redex Work?

So, I am testing the Redex on a car that is 4 years old. I am guessing that there isn’t a huge amount of deposit build-up on the injectors from the 30,000 miles it has done during its time on the road. But after using the first shot bottle of Redex and completing the first 400 miles until the tank was empty, I felt good knowing that I was taking care of the inside of the engine and removing any deposits that may be degrading performance.

On the second and third tanks of fuel, I did notice slightly increased total mileage per tank, but of course, it is very difficult to prove that the Redex System Cleaner was the the factor that influenced the extended range, but it definitely wouldn’t cause a decrease in total range.

Redex - testing for 3 months

I can’t say I have felt any dramatic performance increases in the car at the moment, but in a car of this age, we could be talking about a 2% or 3% improvement at best. You are likely to see more noticeable results from the Redex System Cleaner when used on vehicles at least 10 years old or those that have done higher mileage and had more opportunity for the deposit to build up. I’m sure in these cases you would be able to feel a definite difference in a short period of time, for our test it will be a lot more about the prevention rather than the cure.

Diesel Redex Does it work?

Continued Testing – Does Redex Diesel Work

I am going to keep testing the Redex System Cleaner on my Evoque Diesel and see what I learn over prolonged testing. Even if there are no further gains to be had, in my opinion, it is still good practice to maintain a low level of deposits on the car injectors and keep the engine running as optimally as possible.

Update 3

We’ve been testing Redex System Cleaner for two months now. Our 2.2-litre Diesel Range Rover Evoque has been having the Redex treatment, and is a lot better off for it.

The Benefits of a System Clean

Redex System Cleaner helps maintain and improve the condition of your engine, and removes deposits from your fuel injectors. Harmful buildups on the injectors occur during combustion – Redex helps to eradicate this. Simply add 90ml of Redex to your fuel tank every time you top up; or, if you haven’t used a system cleaner in a while, add a double dose.

Used over time, Redex can improve both engine life and vehicle performance. You get better fuel economy, meaning you get more fuel and more miles for your money. As simple a thing as adding a bit of Redex System Cleaner to your fuel tank can save you money and hassle in the long run. The product also claims to help reduce harmful fuel emissions – so by giving your engine a good clean, you’re also helping the environment.

Does Redex Work?

Redex System Cleaner & Does Redex Work (?) – The Verdict

The car we’ve been testing the product on is 4 years old, with a mileage of just over 30,000. This meant the car probably didn’t have too much buildup on its fuel injectors. However, after just one shot of Redex, the Evoque just felt healthier, and knowing performance wasn’t being degraded over the 400-mile journey put our minds at rest.

See how easy it is to add #Redex Fuel System Cleaner to your car. Redex Fuel Additives #Ad

Posted by Motor Verso on Monday, December 4, 2017

We noticed slight increases in mileage per tank after the second and third additions of Redex. This of course can’t be definitively put down to the system cleaner, but it certainly didn’t hurt. Since our car is relatively young, the best we can expect is a 2-3% improvement in performance. For older cars, say 10 years or older, you can experience more drastic improvements as the fuel deposits will have had more of a chance to gather.

That’s not to say it’s a bad idea to use Redex on a younger car. The cleaner can keep the car operating at an optimal level – preventing buildup rather than fixing it.

Fuel Additive Trial & Does Redex Work: Facts to Know

  1. Redex fuel system additives are fuel system cleaners, not octane boosters, designed to remove the build-up of deposits and keep the fuel injection system clean for better performance and fuel economy.
  2. Redex fuel additives aim to give a clean fuel system that performs more efficiently, leading to better fuel economy and performance.
  3. Real-world trials suggest that Redex fuel additives may not provide a noticeable difference in performance unless used in older or higher-mileage cars.
  4. Redex Advanced 5-in-1 system cleaner is a heavy-duty cleaner while Redex petrol system cleaner is a regular cleaner.
  5. The Redex fuel additive trial was conducted over three months in a 2013 Mazda MX-5 2.0-litre manual in normal driving conditions.
  6. The trial recorded fuel economy every time the tank was filled, manually noting down the litres added and mileage covered.
  7. The fuel economy results did not show significant differences attributable to the use of Redex fuel system cleaners.
  8. The driving conditions and traffic largely influenced the fuel economy more than the fuel additive products.
  9. Redex fuel additives can help keep an engine clean and operating at peak efficiency, especially in older or higher-mileage cars.
  10. Regular use of Redex fuel additives can help prevent future engine damage and improve engine longevity.

Does Redex Work: The Final Say

Overall, we haven’t noticed any extreme changes using Redex over the past few months. However the idea of a system clean is still a good one, though. Redex provides preventative measures for keeping fuel tanks clean and can improve fuel economy over time. We really like the idea of using a cleaner regularly as a way of maintaining the vehicle. After all, we like to keep the bodywork clean and polished – why not the engine too?


  • Leola Moseley Says

    A clean engine is a more efficient engine (and also a more powerful one), so a fuel injector cleaning is an important part of maintaining your car.

  • John Watson Says

    I put redex in my mazda cx5 deisel and it blew the engine

  • Matthew Davey Says

    Hi, I’ve been using Redex Diesel System Cleaner in my 06 Volvo V50 for several years. My car has now done over 194,000 miles and still returns 50mpg, I therefore conclude that Redex must be doing some good as I never have any problems with emissions when having the annual MOT test carried out.

  • Joe Banks Says

    I drive a Mazda 6,2.2,175bho, and use Redex every 4-5 fill-ups, last 2 MOTs passed emissions with advisory due to no emissions..🙂

    • Arne Delve Says

      Did you really intend to say that your car received an advisory because there were NO EMMISIONS – because that would be completely ridiculous!

  • Gary Pearce Says

    I have a diesel van & petrol car, both vehicles are 13 yts old, I always put Redex in both vehicles , well what a difference they no longer seem tired ! & they run so much smoother ! HIGHLY RECOMMEND REDEX 👍

  • Shaun Says

    I came across your site by chance.
    Not a very scientific review! And no real conclusions at the end.
    All of the above looks more like an advertisement than a review.
    Why not try it on a 10 year old car, and maybe a little more scientific.
    There are ways to benckmark a vehicle, before and after 3 months!
    Its not rocket science.

    • Beb Blast Says

      Actually, it is. These are just the sort of investigation and methods they would use in rocket science, among many others.

  • Alan Says

    As Shaun said, the percentage of comments about this product seems like an advertisement and he is absolutely correct. I believe Red-x is an incredible product, but it’s a dangerous product, without understanding the repercussions. If you have an old car that has Carbon build up behind the rings and on the ring lands etc. As well as in the chamber and on the piston crown, because people are to cheap to use the correct octane fuel etc and are running continuously in detonation
    “we’ve all heard an engine that won’t shut down because the carbon build up is so thick and red hot” it acts as a spark plug or crude igniter. The Red-X I know from Australia ” I thought Marvel Mystery oil was approximately the same, but it’s NOT even close”. Anyway, take it as you will, this is nothing more than some other “I read it on the internet, so it must be true” however, if used wisely, not all the time, but reasonably regularly it is a fantastic upper cylinder lubricant, all around cylinder decarbonizer for both carburetor and fuel injection systems cleaner. Especially for carbs , because that sickening ethanol, changes jet orifice size from build up, needle and seat efficiency etc. But if you dump it into an old mistreated engine, you’ll probably make things worse and start burning more oil. Maybe even remove the Carbon build up behind the oil ring and start smoking more. However as far as it being a decent product if they have held true to quality colloidal graphite still ROCKS! Lead, used to help with upper cylinder lubrication even though it was and is a toxic and dangerous substance. I know this first hand as I have three and a half times more lead in my body than a human is allowed. Even sulphur helped upper cylinder, valve guides etc. I own a pair of MTU 16V 538 TB 93’s, basically each cylinder is a 327 cubic inch small block Chevy and theres 32 of them, 6 valves per cylinder, double overhead cam, five sequentially operated turbo chargers on each engine with roller bearing crankshafts and unit injectors.I learnt my lesson the hard way when they started forcing me to use or buy low sulphur diesel. I now use a product called “Lubrizol” Not exactly inexpensive when you’r burning 500 gallons per hour of fuel, but neither is rebuilding 32 cylinder heads and changing pistons and liners. Enough bulls%*t I still believe colloidal graphite, which I believe is the key ingredient of Red-X is an incredible lubricant. Good Luck!

  • Niall Patrick O'brien Says

    Since the introduction of E10 Fuel in the UK switched to Super Unleaded E5 and been using redex. I defiantly notice how smooth the engine runs and slight increased fuel economy. 5 Star Product. Car is: 2002 Ford Fiesta 1250 Freestyle

    • Thank you for sharing your positive experience with Redex and how it has improved the performance of your 2002 Ford Fiesta 1250 Freestyle since switching to Super Unleaded E5. It’s great to hear that the engine runs smoothly and you have noticed a slight increase in fuel economy.

      Your feedback highlights the effectiveness of Redex in maintaining and optimizing engine performance, especially when using the recommended fuel type. This information can be valuable to others who may be considering using Redex or are interested in improving their own vehicle’s performance.

      It’s always rewarding to find a product that delivers on its promises, and it seems like Redex has done just that for you. Thank you for sharing your experience and giving Redex a 5-star rating.

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