Fuel Additives & Cleaners

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Slick 50
Slick 50 Engine Treatment 500ml 159 views today
4.7 / 5 (19)
  • Size : 500ml
£17.99
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Wynn's
Wynn's Xtreme Petrol Emission Reducer 159 views today
4.4 / 5 (15)
  • Size : 325ml
£7.49
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Redex
Redex Petrol Injector Cleaner 500ml 159 views today
4.6 / 5 (48)
  • Size : 500ml
£8.49 £7.49 save £1
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Holts
Holts Cold Start 400ml 159 views today
4.9 / 5 (24)
  • Size : 400ml
£3.99
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Fast Orange
Fast Orange Pumice  Hand Cleaner 440ml 159 views today
4.9 / 5 (21)
  • Size : 440ml
£5.99
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Wynn's
Wynns Total Action Petrol 159 views today
4.6 / 5 (16)
  • Size : 325ml
£12.99
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Carlube
Carlube Petrol Injector Cleaner Double Concentrate 159 views today
4.5 / 5 (10)
  • Type: Petrol Treatment & Additives
  • Size: 300ml
£3.99
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Carlube
Carlube Diesel Injector Cleaner Double Concentrate 159 views today
4.7 / 5 (21)
  • Type: Disel Treatment & Additives
  • Size: 300ml
£3.99
Carlube
Carlube DPF Cleaner Double Concentrate 159 views today
4.4 / 5 (23)
  • Type: Disel Treatment & Additives
  • Size: 300ml
£8.49
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Nitrox
Nitrox Hot Shot Injector Cleaner 500ml 159 views today
3.7 / 5 (7)
  • Type: Petrol Treatment & Additives
  • Size: 500ml
£7.99
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Wynn's
Wynns Formula Gold Petrol Treatment 500ml 159 views today
£16.00 £13.79 save £2.21
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Slick 50
Moly Engine Protector 325ml 159 views today
4.8 / 5 (15)
  • Size : 325ml
£14.99 £10.49 save £4.50
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Redex
Redex Diesel Treatment 500ml 159 views today
4.7 / 5 (41)
  • Size : 500ml
£8.49 £7.49 save £1
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Comma
Comma Diesel Magic 400ml 159 views today
4.6 / 5 (66)
  • Size : 400ml
£7.49
Price Drop
Slick 50
Slick 50 Engine Treatment 750ml 159 views today
4.8 / 5 (24)
  • Size : 750ml
£22.99 £21.49 save £1.50
Displaying   72   of   94   products

Some of us want to eke a little more performance out of our engines. Fuel additives and oil additives give your engines a little extra. Oil additives improve the smoothness of your engine, giving your existing oil a boost. Fuel additives work can improve efficiency and power, lowering emissions and maintaining your engine. At Halfords, we’ve got a large stock of fuel and oil additives suitable for diesel and petrol cars and vans.

We carry engine additives from well-known brands including Millers, Redex and Wynns that have been tested to perform. Online you can compare products and read user reviews to get an inside view on what works best.

Our complete range of fuel and oil additives and internal cleaners are part of our engine oils and fluids, all of which you can find online or instore. Spend over £40 and you’ll qualify for free delivery.

Before using a fuel additive, we recommend that you use an engine cleaner to rid your engine of any nasties that might have built up. As well as engines, we’ve got specific cleaners for fuel injectors and carburettors , EGR cleaner and catalytic converters that will have your car purring in no time. They’re pretty simple to use, but we advise you to follow all instructions to the letter to avoid causing any damage to your vehicle.