10 Best Oil Additive For Engine Knock

The LIQUI MOLY Cera Tec is a ceramic-based engine oil additive designed to reduce friction and wear in petrol and diesel engines. It works by filling in tiny rough spots on engine parts with ceramic particles, resulting in smoother engine operation and potentially extending engine life. This additive can be mixed with all types of engine and gear oils, making it quite versatile and easy to use during oil changes. A 300 ml bottle treats up to 5 liters of oil, which is suitable for most passenger vehicles.

Users may notice lower fuel consumption and reduced pollutant emissions due to decreased friction. Its effect is claimed to last up to 50,000 km, which is a relatively long duration compared to many additives. The product is TÜV certified, lending credibility to its effectiveness. However, it is not suitable for vehicles with wet clutches, so owners of such vehicles should avoid it.

This product is designed to promote smoother engine running as a wear and tear protector that may indirectly help with engine smoothness. It is not specifically marketed as a dedicated knock-prevention additive. It is suitable for drivers looking for an easy-to-use additive to help protect their engine and potentially improve fuel efficiency without needing specialized knowledge or modifications.

The BG EPR Engine Performance Restoration additive is designed for gasoline direct injection engines, making it suitable for many modern cars that might experience engine knocking or reduced performance. Coming in a pack of three cans totaling 3 quarts, it provides enough quantity to treat your engine multiple times or cover larger engines. Its compatibility with gasoline direct injection engines targets common issues like knocking and carbon buildup, which can help improve engine smoothness and performance.

The product's popularity is reflected in a strong customer rating of 4.6 out of 5 from 157 users, indicating that many have found it effective. The packaging in a metal tin is sturdy and easy to store, though the overall size and weight make it a bit bulkier than some other additives.

BG EPR offers a convenient solution if your gasoline direct injection engine is showing signs of knocking or reduced performance, and it is advisable to check your vehicle’s manual or consult a mechanic for proper dosing and usage frequency.

The Liqui Moly MoS2 Friction Reducer is an oil additive designed to improve engine performance by reducing friction and wear inside the engine. This product contains molybdenum disulfide (MoS2), a solid lubricant that helps engines run smoother and can reduce knocking caused by metal parts rubbing against each other. It's compatible with most engine oils and safe to use even with turbochargers and catalytic converters, making it suitable for modern engines.

The additive is concentrated and requires only a small amount per litre of oil, making it cost-effective and easy to use. Its effects last for a significant time, helping to lower both oil and fuel consumption, which may improve engine efficiency. However, while it effectively reduces friction, it is not specifically marketed as a heavy-duty knock eliminator. Therefore, severe engine knocking or knocking caused by other issues might not be fully resolved by this product.

This product is a solid choice for those looking to reduce engine wear and improve smoothness, especially in everyday driving conditions, but it may not provide a quick fix for serious knocking problems.