10 Best Oil Additives 2025 in the United States

The Lucas Oil 10002 Heavy Duty Oil Stabilizer is a well-regarded oil additive, especially popular among car owners looking to enhance their engine performance. One of its main strengths is its formulation with 100% petroleum, which many users find effective in improving engine lubrication and overall efficiency. This product serves multiple purposes due to its blend of viscosity improvers, detergents, anti-wear agents, corrosion inhibitors, friction modifiers, and seal conditioners. These features make it suitable for both new engines and ones operating under high-stress conditions, appealing to a wide range of vehicle types.

On the downside, while the product is versatile, some users may find the oil stabilizer somewhat on the pricier side compared to other additives. Additionally, while it is suitable for a variety of vehicles, those with older engines might want to proceed with caution, as some components may not be ideal for all engine types. Furthermore, the heavy 1-gallon container may be cumbersome for casual users who only need a small amount for their oil changes.

The Lucas Oil 10002 Heavy Duty Oil Stabilizer is an effective, multi-use product that is particularly beneficial for car owners seeking to enhance engine performance and longevity. However, potential buyers should consider their specific vehicle needs and whether the investment aligns with their maintenance routine.

Royal Purple Max-Clean Fuel System Cleaner and Stabilizer is designed primarily to keep fuel systems clean and enhance engine performance. While it’s not a classic oil additive targeting viscosity improvement or seal conditioning directly, it offers a 3-in-1 formula that helps maintain a cleaner engine by removing deposits from fuel injectors and combustion chambers.

Users can expect modest gains in fuel economy (about 3.2%) and horsepower (around 2.6%), which can be appealing if you want better mileage and slightly improved power. It also helps reduce harmful emissions like hydrocarbons, NOx, and CO by roughly 12-18%, contributing to a cleaner environment. However, it does not contain specific anti-wear agents, friction modifiers, or corrosion inhibitors typically found in oil additives, so if your main concern is protecting engine parts or improving oil performance, this product might not fully cover those needs.

The product is vehicle-specific in its fit, making it best suited for users looking for a tailored fuel system cleaner rather than a general oil additive. With its long-standing presence in the market, it serves as a trusted option for regular maintenance to keep fuel systems in good shape, especially if you want to improve efficiency and reduce emissions without changing your oil products.

The BG MOA Motor Oil Additive is designed to enhance the performance and longevity of engine oil in cars and trucks. It is equipped with essential features such as viscosity improvers, detergents, and anti-wear agents, making it an effective option for those looking to protect their engine from wear and tear. The additive also includes corrosion inhibitors and friction modifiers, which help maintain engine efficiency and reduce friction-related damage. Its ability to prevent oil oxidation and thickening ensures that the engine oil remains effective over extended periods.

One of the standout features of this product is its comprehensive approach to engine protection, which includes maintaining peak engine performance and extending the oil's life. This makes it particularly beneficial for those who frequently drive in harsh conditions or have older vehicles that require extra care.

Potential buyers should consider that the product is best suited for people who have a regular maintenance routine and are willing to invest in a 12-pack, which may be more than needed for those with just one vehicle or occasional use. Despite these considerations, the BG MOA Motor Oil Additive remains a strong choice for enhancing engine oil performance, especially for those who value long-term protection and efficiency in their vehicles.