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10 bestOil Additiveof November 2025

112M consumers helped this year.

29% off

STP Diesel Fuel Additive Twin Pack

STP

9.7

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15% off

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

9.4

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

Sea Foam

9.2

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19% off

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

Liqui Moly

8.9

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15% off

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

Wynn's

8.6

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OtherRelated productsUp to 22% off

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

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Wynn's Super Charge Oil Treatment - Enhances Viscosity - Restores Compression & Pressure - Reduces Oil Consumption & Smoke Emissions - Prevents Metal Contact & Engine Wear - 425ml

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