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Car Additives & Flushes

Opie Oils stocks a wide range of engine cleaner, engine flushes, fuel treatments and fuel additives to help keep your fuel system running at peak efficiency, octane boosters for increased performance on road or track plus lead replacement products for older cars.

Please note that we are unable to send fuel treatments to destinations outside the UK.

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204 Products (Viewing: 1 - 61 of 204)

Millers Oils Diesel Power ECOMAX Fuel Treatment Multishot
Millers Oils Engine Flush Fully Synthetic Engine Oil Treatment
Millers Oils Petrol Power ECOMAX Fuel Treatment Multishot
Millers Oils CVL Extra Competition Valve Lubricant - High Octane Booster
Millers Oils CVL (Valve Seat Lubricant & Combustion Enhancer)
RED LINE SI-1 Fuel System Cleaner
Millers Oils VSPe Power Plus Multi-Shot (Ethanol / Lead / Octane) Fuel Treatment
Liqui Moly Engine Flush Plus
Elke PAG ISO 46 Compressor Oil For Automotive Compressor Systems R134a
Millers Oils Diesel Particulate Filter (DPF) Cleaner & Regenerator
Millers Oils VSPe Power Plus One Shot (Ethanol / Lead / Octane) Fuel Treatment
Classic Valvemaster Lead Replacement Additive
Classic Valvemaster PLUS 3-in-1 Lead Replacement Additive
RED LINE WaterWetter Super Coolant Additive
Isopon Leak Stop For Petrol Tanks Radiators & Sumps
Millers Oils Diesel Injector Cleaner
JLM Diesel Turbo Cleaner
VP Racing Madditive Octanium Unleaded
Millers Oils Extra Cool (Corrosion Inhibitor & Coolant Enhancer) Concentrate
Millers Oils Diesel Power ECOMAX One Shot Boost
VP Racing Madditive Octanium

1 Quart (946ml)

Opie Price
Price Beater
Millers Oils Stop Leak Engine and Gear Oil Treatment
Wynns Fuel Biocide For Petrol & Diesel (10601A)
Dipetane Pre-combustion Fuel Treatment - 100% Hydrocarbon (no additives)
Comma Petrol Magic Fuel Additive & Injector Cleaner
Millers Oils Petrol Injector Cleaner
Wynns Engine Flush for Petrol & Diesel Engines - Detergent Based
JLM Diesel Injector Cleaner
Cataclean The Original - Petrol Fuel And Exhaust System Cleaner
Kalimex JLM Diesel DPF Cleaner - Treats Up To 60L of Fuel
Millers Oils Tank Safe Petrol Additive Fuel System Protection
Silkolene PRO BOOST Octane Improver (Fuchs)
Opie Price
Price Beater
Amsoil Diesel Cetane Boost

16oz Bottle (473ml)

Opie Price
Price Beater
Redex Diesel Fuel System Cleaner - 250ml with 100% Extra Free (RADD2201A)
Wynns Super Charge


Opie Price
Price Beater
Elke PAG ISO 46 Compressor Oil With Dye For Automotive Compressor Systems R134a
Wynns Specialist E10 Protector Multi-Shot Ethanol Protection
Wynns CV DPF Regen And NOx Sensor Protector
Free Shipping

1 Litre

Opie Price
Price Beater
Liqui Moly Motor Oil Saver
Comma Engine Flush Oil Additive for Petrol & Diesel Engines
Wynns Injector Cleaner For Diesel Engines (51668A)
Comma Diesel Magic Fuel Additive & Injector Cleaner
Motul MoCool Car & Motorcycle Coolant Additive - Concentrate
RED LINE WaterWetter Special SUPER Coolant Additive - Diesel
Millers Oils Petrol Power ECOMAX Fuel Treatment - One Shot Boost
Castrol Engine Shampoo (Pre-Oil Change Treatment)
RED LINE 85 PLUS Diesel Enhancer
Valvoline VPS HD Diesel System Complete V1
Valvoline Cooling System Stop Leak ML V1
Kalimex JLM Diesel Catalytic Exhaust Cleaner (J02370)
Power Maxed Coolant Seal - Cooling System Leak Repair
Wynns Diesel Turbo Cleaner (31563B)
Wynns Off-Car DPF Cleaner
Comma X-Flow Flush Out Mineral Engine Oil Flush
Wynns Radiator Stop Leak
Ce-Lit Automotive Radiator Leak Repair Cement Sachets
Wynns Radiator Flush
Holts Speedflush Cooling System Cleaner
Holts Radweld Radiator Treatment