In terms of economy, it’s almost impossible to be absolutely definitive as no two weeks are subject to exactly the same usage, weather or road conditions. Thankfully, now we’re finished, we no longer have a hung jury, with all three saying the C-Max is now noticeably smoother, especially when it, or the weather, is cold. H226 - Flammable liquid and vapourH412 Harmful to aquatic life with long lasting effects.H304 May be fatal if swallowed and enters airways.H336 May cause drowsiness or dizziness.

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. We’ve been using Redex Diesel System Cleaner in our 100k mile Ford C-Max for a few months to see if it improves performance and economy. Does it work? Given that the additives I’ve been using are not performance boosters as such, I wasn’t expecting to feel any noticeable differences to my car’s accelerative qualities. If that was the point, Redex has products like its Petrol Power Booster. Alternatively, I could just fill my tank with premium unleaded fuel, which has a higher octane level than regular unleaded and provides extra power. The recent cold snap is what convinced our one dissenting voice, as she found the C-Max far less ‘chuggy’ on first start on cold mornings. So strike one for Redex. Has economy improved?

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 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. It’s a valid question as you’re shoving additives in to your fuel tank, but the fact is that Redex have been delivering their products for almost 100 years, and are happy to declare that “Redex products will never cause any damage or impairment to your car”, and will do nothing more than provide a “reliable engine-cleaning solution” for users. Which is reassuring. 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. 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.

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.Yes, we will. But, to be honest, we’ll probably be misers and drop down to using it every other fill-up (which will make it cost just 2.5p per litre of diesel) and see if we notice the C-Max starting to use a bit more fuel, or be less happy when cold. Please note though, Redex has been safe-tested at 4 times the recommended dose, so please don’t exceed this. What is the Mix Ratio for Redex? We had no hesitation in trying this out, especially as just about everyone at Cars UK Towers has used Redex at one time or another, and were confident it was safe to use.