How do I add Redex to my car?

Redex fuel additives are simple and easy to add to your car, requiring no mechanical expertise in order to be effective. Our advanced fuel additives and system cleaners are designed to work just like a fuel pump; each bottle features a long neck for easy pouring directly into your fuel tank, while its specially-designed shape makes it easy to add single or double shots of the product as required.

Whether you drive a petrol or diesel car, the process of adding Redex fuel additives is just the same. We’ve made it easy to add the right dose to your car in a matter of seconds, so you can benefit from improved engine health and performance without any complex additional maintenance.

The following guide sets out how to add a dose of Redex fuel additive to your car, along with an instructional video that fully demonstrates how the product works once it’s inside the fuel system.

How to Add Redex to Your Car

  • Step 1 – Detach your car’s fuel filler cap and remove the lid and protective seal from the Redex product.
  • Step 2 – Insert the neck of the bottle into the fuel tank. Our specially-designed bottle features a universal-sized neck that should fit easily into all petrol and diesel fuel tanks, regardless of the type of fuel filler cap you have.
  • Step 3 – Pour a single shot of Redex fuel additive into the system. Again, the innovative design of the bottle makes it easy to add the right amount. Not sure how much you need? Read our expert guide.
  • Step 4 – Remove the bottle from the fuel tank and reattach the fuel filler cap. And that’s it! Redex will now get to work, circulating through the system to clear dirt and deposits and keep your car’s engine in the best condition possible.

We told you adding Redex fuel additives to your car was easy! In fact, dosing your vehicle with Redex is that simple, many of our customers add the product whenever they fill up with fuel.

Remember, though, that whilst we’d recommend adding a shot of Redex each time you fill up, the product can be added at any time – provided your vehicle is adequately fuelled.

Looking for further help on adding Redex to your car? Or want to see the product in action? Check out our instructional video below…


If you still have questions about Redex, view our Contact Us page to find out how you can get in touch. You’ll also find additional help and advice on our help, advice and FAQ pages.