One shot of Redex fuel cleaner is capable of treating a fifty-litre fuel tank, but those who have never used a fuel additive before – or those who own an older car – may wish to use two shots for an intensive clean, particularly during first application. It still seemed to choke a bit more at first, but started to perform a bit better a few days later. Read less I mentioned in my last report that I’d previously noticed a slight cough or misfire from the Mazda on a couple of occasionsprior to using the Redex products, but hadn’t noticed anything since using the fuel system cleaners. I can report that the engine has still been running cleanly over the last six weeks, so the stuff appears to be doing its job in that respect. Summary The initial baseline figure of 30mpg is pretty indicative of my usual fuel economy result, although usually that’s relying on the car’s trip computer reading rather than direct measurement. Below is a table of my last recording before starting withthe Redex products, followed by one tank of the heavy-duty Redex Advanced 5-in-1 system cleaner and then six tanks using the regular Redex petrol system cleaner.

H226 - Flammable liquid and vapourH304 May be fatal if swallowed and enters airways.H336 May cause drowsiness or dizziness.H412 Harmful to aquatic life with long lasting effects. Talking of de-carbonising,whilst attending Grantham Tech in the mid-late `70`s,amongst the various engines,cutaways etc we had in the w/shop dept ,there was a Commer 2-stroke diesel engine http://en.wikipedia.org/wiki/Commer_TS3 .Was told that on reaching the finite amount of carbon build-up that clearances on this fascinating engine allowed they would self de-carbonise whilst vehicle was on the move...probably not a nice vehicle to be following at such a time.Redex makes the engine run smoother. I have made HP/KW tests before and after Redex and there is a noticeable difference. Removes built-up carbon from the underside of the valves. Reduces emissions, tested it on my car before and after before MOT inspection. Redex Petrol fuel additives can be used safely with new E10 fuel in E10 compatible cars, as well as with E5. How Much Should I Use? Each Redex bottle clearly shows how many shots it contains on the front label, with easy guide ‘shot’ marking on the side. Adding more than one shot of Redex won’t do any harm to your car and can give you a more intensive clean, so don’t worry if your pouring isn’t exact. Given that your engine creates dozens of explosions every single second, there’s a lot of combustion going on under your bonnet. With any burning of fuel, there will be deposits and debris that forms. Sometimes it’s obvious, like the ash that forms when you burn a log in a fireplace. Other times, like in your car’s engine, these deposits are microscopic, but the principle is the same. Over time, these deposits build up and affect your ability to keep burning the fuel properly.

It has markings on its side so you know how much to put in, but it's hard to judge once the bottle is upside down.Pour in one dose of Redex – The size of Redex bottle you have will determine the amount to pour in. A single dose will treat a 50 litre tank As I’ve made clear previously, this isn’t a laboratory test in controlled conditions but rather a real-world trial that gives a decent indication of what any driver can expect in everyday life.

After the initial 500mL dose of Redex Advanced 5-in-1 system cleaner, I have been adding a small 90mL bottle of Redex petrol system cleaner every time I have filled up my fuel tank for three months. In my situation, I don’t think I really need to keep using the additives at that rate in my car. I am likely to add a 90mL bottle every month or so and probably use the concentrated cleaner every six months to keep the Mazda’s fuel system sparkling clean. If I had an older car (or when this one starts getting older and higher-mileage), I’d keep using it every tank or at least every other tank. The purpose of the Redex fuel system cleaners is to remove this build-up of deposits and keep the fuel injection system clean. By doing so, the fuel will burn more cleanly and therefore give you better performance and fuel economy as the engine is working more efficiently. My fuel economy figures haven’t shown any changes that could really be attributed to the Redex products. The variation of 3-4mpg above or below the average based on driving conditions and traffic outweighs any potential gain from the products. Again, if you were running a laboratory experiment that directly measured fuel consumption and removed all other variables then you may be able to show an improvement, but it’s nothing really noticeable.

Redex Redex Diesel System Cleaner

Our petrol and diesel fuel system cleaners are supplied in 250ml and 500ml sizes. The smaller 250ml version contains two doses / shots and the 500ml provides 4 shots.