10 Best Engine Oil Additives 2025 in the United States

The Sea Foam SF128 Motor Treatment is a versatile and reliable engine oil additive that is well-suited for those looking to maintain and enhance their engine's performance. One of its main strengths lies in its ability to dissolve and clean fuel deposits and sticky residues from key components like gas and diesel injectors, carburetors, and combustion chambers, ensuring that the engine runs smoothly and efficiently.

Additionally, the product is effective in stabilizing stored fuel for up to two years, which is beneficial for those who may not use their vehicles frequently. This stability helps prevent the formation of gum and varnish, preserving the quality of the fuel over time. Another notable feature is its high-temp upper cylinder lubricity, which provides essential lubrication and protection to the fuel system from wear and corrosion. This can prolong the life of the engine and improve its performance.

One of the biggest advantages of Sea Foam is that it contains only petroleum-based ingredients without harsh detergents or abrasive chemicals. This makes it a safer option for your engine, reducing the risk of damage. For consumers seeking a comprehensive solution to clean and maintain their engine, Sea Foam SF128 Motor Treatment is a practical and effective choice.

SeaFoam SF-16 Motor Treatment is known for its versatility and efficiency in maintaining and improving engine performance. The product ranks well in the automotive category, especially in fuel system tools, which suggests reliability and popularity. It’s a multipurpose cleaner and lubricant that can be used in both gasoline and diesel engines, which is a significant advantage for users with different types of vehicles.

The treatment works well in dissolving and cleaning deposits from fuel injectors and carburetors, which helps improve engine performance and efficiency. Additionally, it helps to stabilize fuel by preventing the formation of varnish and gum deposits, which can be beneficial for both daily drivers and vehicles that are stored for longer periods.

For those looking for a versatile engine treatment that can clean, protect, and improve fuel system performance, SeaFoam SF-16 seems like a strong contender.

The Lucas Oil 10002 Heavy Duty Oil Stabilizer is designed for multiple vehicle types and promises to enhance oil performance in several ways. This product notably increases oil life by at least 50%, which means fewer oil changes and potential cost savings. It also reduces oil consumption, making it a great choice for vehicles that tend to burn oil quickly. The eliminations of dry starts can be particularly beneficial, as it ensures that the engine is well-lubricated from the moment it is started, reducing wear and tear over time.

Additionally, the stabilizer raises oil pressure, which can improve engine performance and efficiency. Users have also reported increased power and better fuel efficiency, which are significant advantages for any vehicle owner looking to optimize their vehicle's performance and save on fuel costs.

On the downside, while the product performs well in enhancing oil properties, it may not contain specific detergents, friction modifiers, or seal conditioners. As a result, users looking for comprehensive engine protection might need to use additional products to meet these needs.