10 Best Engine Oil Additives 2025 in the United States

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.

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.

The Archoil Ultimate Diesel Kit is specifically designed for diesel vehicle owners who want to maintain and enhance their engine’s performance. This kit includes three key products: the AR9100 Friction Modifier, AR6500 Diesel Treatment, and AR6400-D Diesel Fuel System Cleaner. These products work together to improve engine efficiency, clean the fuel system, and boost fuel quality. The AR9100 Friction Modifier helps reduce wear and friction within the engine, contributing to a smoother and longer-lasting performance.

The AR6500 Diesel Treatment is meant to be used at every fill-up and is capable of treating up to 400 gallons of fuel, making it a cost-effective choice for regular maintenance. The AR6400-D Diesel Fuel System Cleaner rapidly cleans the fuel system, ensuring optimal engine performance and fuel efficiency while also providing a cetane boost, which can enhance combustion and power output.

One potential downside is the initial investment cost, as purchasing the entire kit may be more expensive compared to individual treatments. However, the comprehensive benefits and the fact that it addresses multiple aspects of engine care make it a valuable option for those committed to maintaining their diesel engines in top condition. The kit's design and packaging also make it easy to store and use. The Archoil Ultimate Diesel Kit is a highly recommended product for diesel vehicle owners seeking a comprehensive solution to engine maintenance and performance enhancement.