10 Best Oil Additive For Engine Knock 2025 in the United States

The Liqui Moly MoS2 Anti-Friction Engine Treatment is a notable oil additive designed to enhance engine performance by reducing friction. This product is universally compatible with different types of motor oils, making it versatile for a wide range of vehicles.

One of its main strengths is its ability to form a high load-bearing film on all friction surfaces, which significantly reduces engine wear and tear. Users report that it can make engines run smoother and quieter, even at high RPMs, which is impressive for an oil additive. The product's flash point is 181 degrees Celsius, indicating good thermal stability.

It holds the #1 rank in Engine & Oil Fluid Additives, showing its popularity and effectiveness. If you are specifically seeking to reduce engine knock and improve engine smoothness, this product is a strong contender.

The LIQUI MOLY Oil Additive Cera Tec is designed to enhance engine performance and protection, making it a solid choice for those looking to address engine knock in both petrol and diesel engines. One of its main strengths is its ceramic technology, which offers excellent wear and tear protection, ultimately resulting in smoother engine operation. Users will likely appreciate its ability to reduce friction, which can lead to better fuel efficiency—a key benefit for anyone trying to save on fuel costs.

Its compatibility with all commercially available motor oils is another strong point, as it can easily be integrated into existing engine oils without worry. Moreover, the additive is stable under extreme thermal and dynamic loads, making it suitable for various driving conditions. This resilience also extends to its resistance to both high and low temperatures, ensuring consistent performance regardless of the climate.

While it offers numerous benefits, potential users should be aware that its effectiveness might vary depending on the specific engine condition and previous oil treatments. Some may also question the actual fuel efficiency improvements or performance enhancements they experience, as results can differ based on individual driving habits and vehicle maintenance routines. Additionally, while it claims to be compatible with all filter systems, some may still prefer to consult with a mechanic to ensure optimal compatibility with their specific vehicle.

The Lucas Oil 10001 Heavy Duty Oil Stabilizer is a popular oil additive known for its ability to keep engines running smoothly under demanding conditions. Formulated with 100% petroleum, it offers multi-use versatility and is suitable for new engines. One of its primary strengths is its effectiveness in improving viscosity, which can help reduce engine knock and improve performance in both high and low temperatures.

Its anti-wear agents and friction modifiers further enhance engine protection and efficiency, making it a trusted choice among professionals and everyday users alike. The product also contains detergents and dispersants that help keep the engine clean by preventing sludge and varnish build-up, which is crucial for maintaining engine health over time. Additionally, it includes seal conditioners that can rejuvenate engine seals and prevent leaks.

Available in convenient 1-quart and 1-gallon bottles, its universal fit makes it suitable for a wide range of vehicles. It is a reliable option for those looking to enhance their engine's performance and longevity. Users should ensure it meets their specific needs, especially regarding octane boosting requirements.