10 bestOil Additive For Engine Knockof June 2026
112M consumers helped this year.
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
Lucas Oil 10002 Heavy Duty Oil Stabilizer, 3.785 Litre, White
Lucas Oil
9.6
41% off
3
LIQUI MOLY Oil Additive | 300 ml | Oil additive | SKU: 2591 (Pack of 2)
Liqui Moly
9.4
4
Lucas Oil 10001 Heavy Duty Oil Stabiliser, 946 ml
Lucas Oil
9.1
5
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
8.8
6
LIQUI MOLY Pro-Line Oil Loss Stop | 1 L | Oil additive | SKU: 5182
Liqui Moly
8.5
7
Slick 50 Engine Treatment Oil Additive Treatment 500ml 61399500
Slick 50
8.3
5% off
8
STP GST61300EN Oil Treatment for Diesel Engines 300 ml
STP
8.0
9
STP Oil Treatment for Petrol Engines 450 ml, Protects your Engine by Reducing Deposits, Reduced Oil Consumption, Mechanical Car Cleaning Products, Made in the UK
STP
7.7
10
Lucas Oil 10130 Synthetic Stabilizer-946ml
Lucas Oil
7.4
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