10 Best Additive For Noisy Lifters 2025 in the United States

The Liqui Moly Hydraulic Lifter Additive is designed to reduce engine noise caused by noisy lifters by improving the lubrication of your engine oil and cleaning valve bores. It's compatible with a wide range of vehicles, including those with turbochargers and catalytic converters, which is helpful if you drive a modern car with these features. The additive works by enhancing lubrication properties, which helps hydraulic tappets operate more quietly and smoothly. It also helps clean parts inside the engine, which can prevent buildup that might cause noise or reduce performance.

One of the key benefits is its dual action—both cleaning and lubricating—which means it can help maintain the engine's health over time. The product has a moderate flash point (60°C), so it should be handled with some care, but this is typical for additives. In terms of ease of use, it comes in a handy pack size that’s not too bulky.

This product suits vehicle owners looking for a simple, effective way to reduce lifter noise and keep their engine parts cleaner and better lubricated. Its compatibility with turbocharged and catalytic converter-equipped engines is a plus, making it versatile for many modern cars. However, this additive is not a fix for mechanical issues beyond noisy lifters—it serves as a maintenance aid rather than a repair solution. If you’re experiencing severe engine noise or other problems, a mechanic’s inspection is still recommended.

The Liqui Moly MoS2 Anti-Friction Engine Treatment is designed to enhance engine performance by reducing friction, making it a suitable choice for car owners looking to address noisy lifters. One of its major strengths is its ability to form a high load-bearing film on friction surfaces, which can significantly improve engine sound and stability, particularly at high RPMs.

Compatibility is another positive aspect, as this additive has a universal fit type, meaning it can be used in a variety of vehicles. However, there are some considerations to keep in mind. While the product boasts impressive cleaning and lubrication properties, its effects may vary depending on the specific condition of the engine. Some users might not experience the dramatic improvements they expect, especially if their engine has been poorly maintained or is significantly worn.

Furthermore, as with many additives, it is essential to follow the manufacturer's instructions closely to achieve the best results. While the flash point of 181 degrees Celsius is adequate for most conditions, it could raise concerns for those operating in extreme environments. The Liqui Moly MoS2 Anti-Friction Engine Treatment is a solid option for car owners looking to minimize engine noise and enhance performance, particularly for noisy lifters, but individual results can vary, and proper maintenance is key to getting the most out of any additive.

Sea Foam Motor Treatment is a versatile fuel and oil additive designed to clean and lubricate engine parts, which is especially useful for noisy lifters. It works well with both gasoline and diesel engines, as well as with all types of motor oils, including synthetic and conventional, making it highly compatible. This product effectively cleans fuel injectors, carburetor passages, intake valves, and combustion chambers, which helps reduce noise caused by deposits and poor lubrication.

It also lubricates the upper cylinders, helping to protect engine components and smooth out noisy lifters. The treatment works in the crankcase oil to break down harmful residues, which helps maintain engine health over time. Its viscosity and additive type are suitable for long-term use and it even stabilizes fuel for up to two years, which can be helpful if you don't use your vehicle frequently.

While it lubricates and cleans well, it may not replace the need for mechanical repairs if noisy lifters are caused by worn parts. Additionally, it comes in a 16 oz bottle (pack of four), which might be more than needed for casual users. With its well-established reputation, Sea Foam offers a dependable solution for those seeking to reduce engine noise and maintain performance through effective cleaning and lubrication.