10 Best Diesel Oil Additives 2025 in the United States

The Lucas LUC10013 Fuel Treatment is a diesel oil additive that offers several beneficial features for diesel engine owners. One of its main strengths is its ability to clean and lubricate the fuel system, which can improve the performance of fuel injectors and the combustion chamber. This cleaning action helps remove deposits that can build up over time, leading to improved fuel efficiency and potentially better fuel economy. Users may appreciate its role in reducing harmful emissions as well, making it a good choice for those looking to lessen their environmental impact.

Moreover, the product is designed to enhance power and acceleration, as it promotes better fuel flow and can help the engine run more smoothly. For those using low sulfur fuels, the Lucas treatment also neutralizes associated problems, which is a handy feature.

While the product does provide corrosion protection, its effectiveness can vary based on the specific conditions of their engine and fuel quality. Additionally, the application requires a gallon's worth of product, which could be more than some casual users need, and it may take time to notice a significant change in performance. It's also important for users to follow the dosage instructions carefully to avoid any issues with over-treatment.

The Archoil Diesel Fuel System Kit combines two products: the AR6500 Diesel Treatment and the AR6400-D Diesel Fuel System Cleaner, making it a solid choice for diesel vehicle owners looking to maintain and enhance their engine performance. One of its strong points is its ability to restore key components of the fuel system, such as injectors and turbo, which is essential for keeping your vehicle running smoothly. The inclusion of cetane boosters is a great feature, as it can lead to improved engine performance and better fuel economy.

However, there are some limitations to be aware of. While it does a good job for regular maintenance, it's important to note that the AR6400-D is not intended to address HEUI injector stiction issues. For that, users need to look for the AR9100 Friction Modifier, which means that this kit may not cover all possible diesel engine problems. Additionally, while some users may find the products effective, others might expect more comprehensive solutions, particularly for older or heavily used vehicles.

The Archoil Diesel Fuel System Kit serves as a reliable option for those aiming to improve and maintain their diesel engines, particularly focusing on routine maintenance and performance enhancement. Nonetheless, for specific problems like injector stiction, additional products may be necessary to fully address those concerns.

The Archoil AR6500 Diesel Treatment is designed to enhance the performance and longevity of diesel engines. One of its primary strengths is its wide-ranging applicability, as it is suitable for all diesel vehicles. A single 40.6 oz bottle can treat up to 400 gallons, making it cost-effective for frequent use. This additive includes a blend of detergents, cetane boosters, lubricity enhancers, anti-gel agents, corrosion inhibitors, and stabilizers, addressing multiple key specs necessary for maintaining modern diesel engines.

The product is particularly notable for its ability to clean the post-combustion system, including components like the turbo and Diesel Particulate Filter (DPF), which can help prevent premature failures and reduce the frequency of regeneration cycles. On the downside, some users might find the initial cost high, but considering its effectiveness and the volume it treats, it could be a valuable investment for those looking to maintain their diesel engines over the long term. The product’s robust formulation also ensures that the fuel system, including high-pressure common rail (HPCR) systems, is cleaned, lubricated, and protected.

In summary, the Archoil AR6500 is a comprehensive diesel treatment that excels in enhancing engine performance, fuel economy, and system longevity, making it a worthwhile choice for diesel vehicle owners.