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 Archoil AR9100 Oil Additive is a versatile engine oil additive designed to enhance the performance and longevity of various engine components. This 16oz additive is suitable for both diesel and gasoline engines and can be used in gearboxes, hydraulics, differentials, and power steering systems. One of its key strengths is its ability to fix cold start injector problems in 6.0L and 7.3L Power Stroke engines, making it particularly beneficial for Powerstroke diesel owners.

Additionally, it helps reduce engine noise, vibration, and heat, while also decreasing wear and extending the life of engine components. The additive's friction-modifying properties help improve engine performance, while its anti-wear agents and corrosion inhibitors protect vital engine parts from damage.

The Archoil AR9100 seems to be a solid choice for improving engine performance and longevity, especially for those dealing with Powerstroke diesel engine issues.