Best Additives Deals Online in the UK (24 Deals Found)

Last Updated - 29/10/2026 Sort By:

Best Choice
Archoil

New
Archoil AR6900-D MAX Advanced Diesel Additive Concentrate - 1 Litre
EXCEPTIONAL HIGH-PERFORMING SUPER DIESEL FUEL. AR6900-D MAX converts low-quality supermarket diesel into high-performing

£27.95
Best Value
Thorsons

New
E FOR ADDITIVES: A Simple Guide to Food Additives and Preservatives (Completely Revised Bestselling Number Guide)
New

£12.46 £12.99
New
Hydra LMA-20 Petrol Additive & Stabilizer for all 2-Stroke and 4-Stroke Engines
Petrol fuel stabilizer for all 2 and 4 stroke engines, prolongs the shelve life of petrol by stabilising it during stora

£8.75
Liqui Moly

New
LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591
Item Package Length: 5.5cm

£6.90
New
Putoline Fuel Stabilizer 150ml Motorcycle E10 Additive - for 20L of fuel
Fuel Stabilizer is an advanced protection product specially developed for the fuel tank and the entire petrol injection

£8.95
Wynn's

New
Wynn's Crystal Clean & Protect - Prevents AdBlue® Crystallisation - 125ml | Additive for Use with AdBlue® - Prevents Cry
✅ HELPS PREVENT CRYSTAL FORMATION IN SYSTEMS USING ADBLUE: Specially formulated for use with AdBlue, this additive helps

£8.95
Liqui Moly

New
LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Les
SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high th

£27.98
New
Bardahl EGR Valve Cleaner Additive 300ml
The EGR (Exhaust Gas Recirculation) valve problems result in the clogging of the return system controlled by the valve a

£16.67
39% Off
Redex

New
Redex Diesel Fuel System Cleaner 250ml, Diesel Additives To Remove Harmful Emissions, Maximise Performance & Increase Fu
REDEX DIESEL FUEL ADDITIVE: Use Redex Diesel Treatment Fuel Additive, the specialist diesel system cleaner, lab designed

£2.75 £4.49
New
DERV Control 6000 - Diesel Additive for Bacterial Control 1 Litre (1 x 1 Litre)
To use simply drain as much water from the fuel as possible.

£28.49
39% Off
Redex

New
Redex Petrol System Cleaner 250ml, Petrol Injector Cleaner To Remove Harmful Deposits, Maximise Performance & Increase F
REDEX PETROL FUEL ADDITIVE: Use Redex Petrol Additive For Cars, the specialist petrol system cleaner, lab designed to re

£2.75 £4.49
Liqui Moly

New
Liqui Moly 2770 - Engine Oil Additive
Prevents hydro tappet noise. Lubrication holes and ducts in the oil circuit are cleaned. Secures optimal hydro tappet pe

£9.89
17% Off

New
DIESEL ADDITIVE EOLYS FLUID KIT 1L - CITROËN PEUGEOT
DIESEL ADDITIVE EOLYS FLUID KIT 1L - CITROËN PEUGEOT.

£24.96 £30.00
NutriPaw

New
NutriPaw Dental Formula Water Additive For Dogs & Cats - Clean Teeth, Healthy Gums & Fresh Breath - Manage Plaque & Tart
CLEAN TEETH & HEALTHY GUMS - Easy, quick & effective way to support your cat or dog's dental health. Helps to manage pla

£24.99
New
Lucas Octane Booster 444ml 3x Boost Racing Formula Petrol Fuel Additive 6 Units
Lucas Octane Booster - A Real Octane Booster! Lucas Octane Booster is a GENUINE Performance Enhancer! It's safe for turb

£65.99
Liqui Moly

New
LIQUI MOLY Speed Tec Diesel | 250 ml | Diesel additive | SKU: 3722, k.A. | 3722 / 250 ml for 70 L diesel fuel, Speed Tec
This advanced fuel additive has been developed specifically to noticeably improve acceleration in the partial load range

£11.38
New
Quieten Top End Rattle Noisy Tappets MPG+ G-LAY Engine Restore Oil Additive 30ml
🔇5× Quieter & Smoother Drive – Say goodbye to rattles and noisy tappets.

£20.89
New
2x Liqui Moly Hydraulic Valve Lifter Oil Additive Treatment Petrol Diesel Engine
One 300 ml can of Liqui Moly hydraulic tappet additive is sufficient for up to 6 liters motor oil.

£18.75
New
BEST ENGINE ADDITIVE- AMETECH ENGINE RESTORER 250ml, Reduce Oil Burn, Blue Smoke
In so doing, it alleviates and cures many of the usual symptoms of engine wear, such as blue smoke and high oil consumpt

£27.94
New
Additive Friction Modifier
Additive Friction Modifier This high quality Motorcraft / Limited slip additive is intended for use in certain limited s

£24.14
New
Rislone Super Transmission Fix Automatic Transmission Treatment & Stop Slip
1 x Rislone Super Transmission Fix 34516 500ml.

£49.99
New
XADO EX120 BOX for Power Steering & Hydraulic Equipment Restore Oil Additive
XADO’s Revitalizant technology has been independently tested and proven to work.

£24.90
New
HYDRA DPF-24 Diesel Particulate Filter Cleaner Fuel Additive x4 250ml treats 60L
HYDRA DPF CLEANER SOLUTION.

£56.40
New
SL Customz 5L Pure Methanol Fuel Additive – Performance Petrol / Octane Booster
SL CUSTOMZ – PURE CHEMISTRY.

£30.00

24 Additives deals are available from: Amazon, eBay stores, starting from £2.75.
The biggest discount we found is 39% on Redex Petrol System Cleaner 250ml, Petrol Injector Cleaner To Remove Harmful Deposits, Maximise Performance & Increase Fuel Economy Fuel Additives For Petrol Engines, Suitable For Hybrids at Amazon.
The lowest price we found is £2.75 while the highest is £65.99.
Prices for the best Additives deals average at £22.62.
Last updated on October 29, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Additives.