10 bestEngine Oil Additivesof March 2026
112M consumers helped this year.
11% 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
9.7
2
Sea Foam 1 Pack (16 Ounce) Extreme Marine & Rv SF-16 Seafoam Liquid 16 Fl Oz
Sea Foam
9.4
3
LIQUI MOLY Pro-Line Oil Loss Stop | 1 L | Oil additive | SKU: 5182
Liqui Moly
9.1
4
LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591
Liqui Moly
8.8
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
8.5
OtherUp to 10% off
Lucas Oil 10130 Synthetic Stabilizer-946ml
LIQUI MOLY Motor Oil Saver | 300 ml | Oil additive | SKU: 1802
WYNNS Formula Gold Engine Oil Treatment - Improves Compression & Reduces Wear - Enhances Oil Viscosity & Cleans Engine Internally - 500ml
Wynn's Stop Smoke - Reduces Exhaust Smoke Due to Oil Burning - Improves Compression, Viscosity & Engine Performance - Compatible with All Oils & Engine Types - 325ml
26% off
6
Liqui Moly 2770 - Engine Oil Additive
Liqui Moly
8.3
7
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
8.0
8
Wynn's Super Charge Oil Treatment - Enhances Viscosity - Restores Compression & Pressure - Reduces Oil Consumption & Smoke Emissions - Prevents Metal Contact & Engine Wear - 425ml
Wynn's
7.7
14% off
9
STP GST62450EN06 Engine Flush for Petrol & Diesel Engines 450 ml
STP
7.4
10
LIQUI MOLY Motor Protect | 500 ml | Oil additive | SKU: 1018, Black
Liqui Moly
7.1
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