Fuel & Oil Additives

71 results
Sort by:
Sort by
Halfords AdBlue 10L 159 views today
  • Size : 10 Litres

2 for £20 Halfords AdBlue 10L

Discount applied in basket.

we Fit for £17.50
Wynns Engine Stop Leak 325ml 159 views today
£6.00 £5.00 save £1
Carlube Carb and Air intake Cleaner 159 views today
  • Type: Engine Cleaners 
  • Size: 400ml

20% off a range of Carlube

Discount already applied.

£6.50 £5.20 save £1.30
Carlube Petrol Injector Cleaner Double Concentrate 159 views today
  • Type: Petrol Treatment & Additives
  • Size: 300ml

20% off a range of Carlube

Discount already applied.

£4.00 £3.20 save 20%
Halfords AdBlue 3.5L 159 views today
  • Size : 3.5 Litres
we Fit for £13.00
Displaying   24   of   71   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.