10 bestEngine Oil Treatmentsof May 2025
112M consumers helped this year.
10% off
1

LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1
Liqui Moly

9.8
2

STP Engine Stop Leak for Petrol & Diesel Engines 300 ml, Improved Concentrated Formula, Conditions your Engine and Prevents Minor Oil Leaks, Mechanical Car Cleaning Products, Made in the UK
STP

9.6
3

Slick 50 Engine Treatment Oil Additive Treatment 500ml 61399500
Slick

9.3
10% off
4

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

9.0
5

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

8.7
OtherUp to 39% off
6

Sea Foam Motor Tune - Up SF16 For Petrol and Diesel Engines (2)
Sea Foam

8.5
7

Liqui Moly 2770 - Engine Oil Additive
Liqui Moly

8.2
5% off
8

Sea Foam 1 Pack (16 Ounce) Extreme Marine & Rv SF-16 Seafoam Liquid 16 Fl Oz
Sea Foam

7.9
9

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

7.6
10

Wynn's Stop Smoke For Oil Additive For Reducing Petrol & Diesel Engine Exhaust Emissions
Wynn's

7.3

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