10 bestOil Additiveof June 2025
112M consumers helped this year.
1

STP Ultra 5 in 1 Petrol System Cleaner 400ml, Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK
STP

9.9
2

Redex Petrol System Cleaner 250ml, Petrol Injector Cleaner To Remove Harmful Deposits, Maximise Performance & Increase Fuel Economy With Redex Fuel Additives For Petrol Engines, Suitable For Hybrids
Redex

9.8
3

Sea Foam Motor Tune - Up SF16 For Petrol and Diesel Engines (3)
Sea Foam

9.7
7% off
4

STP Diesel Fuel Additive Twin Pack
STP

9.5
10% off
5

Wynn's Engine Oil Stop Leak - Prevents & Stops Oil Leaks - Restores Elasticity of Seals & O-Rings - Lubricates & Protects Engine Seals - Safe for All Engine Oils - 325ml
Wynn's

9.3
OtherUp to 7% off
6

LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591
Liqui Moly

9.1
19% off
7

LIQUI MOLY Oil Additive | 125 ml | Oil additive | SKU: 1800
Liqui Moly

8.9
8

Wynn's Diesel Injector Cleaner - Reduces Knocking & Black Smoke - Protects Fuel System from Corrosion - Safe for EGR, Turbo, DPF & SCR - 325ml
Wynn's

8.7
9

Liqui Moly 2770 - Engine Oil Additive
Liqui Moly

8.5
10

Wynn's Formula Gold High-Performance Petrol System Treatment - Enhances Engine Efficiency - Improves Acceleration & Reduces Noise - Cleans & Protects Fuel Injection System - 500ml
Wynn's

8.2

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