10 bestEngine Oil Additivesof February 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
LIQUI MOLY Pro-Line Oil Loss Stop | 1 L | Oil additive | SKU: 5182
Liqui Moly
9.4
3
Sea Foam 1 Pack (16 Ounce) Extreme Marine & Rv SF-16 Seafoam Liquid 16 Fl Oz
Sea Foam
9.1
4
LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591
Liqui Moly
8.9
5
Wynn's Stop Smoke - Reduces Exhaust Smoke Due to Oil Burning - Improves Compression, Viscosity & Engine Performance - Compatible with All Oils & Engine Types - 325ml
Wynn's
8.6
OtherUp to 51% off
Lucas Oil 10130 Synthetic Stabilizer-946ml
LIQUI MOLY Motor Oil Saver | 300 ml | Oil additive | SKU: 1802
Bg Products MOA & EPR Motor Oil Additive Lubrication Supplement Engine Restore
STP Oil Treatment for Diesel Engines 3000 ml, Protects your Engine by Reducing Deposits, Reduced Oil Consumption, Mechanical Car Cleaning Products, Made in the UK
10% off
6
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
8.3
7
Wynn's Super Charge Oil Treatment - Enhances Viscosity - Restores Compression & Pressure - Reduces Oil Consumption & Smoke Emissions - Prevents Metal Contact & Engine Wear - 425ml
Wynn's
8.0
26% off
8
Liqui Moly 2770 - Engine Oil Additive
Liqui Moly
7.7
9
WYNNS Formula Gold Engine Oil Treatment - Improves Compression & Reduces Wear - Enhances Oil Viscosity & Cleans Engine Internally - 500ml
Wynn's
7.4
10
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
7.1
Related Reviews You Might Like
Best Reviews Guide Newsletter
Get exclusive articles, recommendations, shopping tips, and sales alerts
Sign up for our newsletter to receive weekly recommendations about seasonal and trendy products
Thank you for subscribing!
By submitting your email address you agree to our Terms and Conditions and Privacy Policy