10 Best Diesel Additives 2025 in the United States

Archoil AR6500 Diesel Treatment is a versatile additive suitable for all diesel vehicles. A 40.6 oz bottle can treat up to 400 gallons of fuel, making it a cost-effective option for frequent use. One of its primary strengths is its ability to clean the post-combustion system, including turbos and DPFs, which can prevent premature failures and reduce the frequency of regenerations. This feature is particularly beneficial for maintaining the longevity and efficiency of diesel engines.

Additionally, it incorporates a strong cetane booster, which can improve power and responsiveness, giving your vehicle a noticeable performance boost. The additive also excels in cleaning, lubricating, and protecting the entire fuel system, including high-pressure common rail (HPCR) systems, which are prone to deposits and wear.

Archoil AR6500 is a robust choice for those looking to enhance engine performance and protect their fuel systems, especially for users prioritizing power, response, and post-combustion cleaning.

Hot Shot's Secret Everyday Diesel Treatment in a 16-ounce squeeze bottle offers several strong features that cater to diesel engine needs. It effectively boosts cetane by up to 7 points, which can enhance power, performance, and fuel economy. This is a significant advantage for those looking to improve their diesel engine's efficiency and performance.

The product also stabilizes fuel and disperses moisture, which helps prevent issues related to fuel degradation and water contamination, ensuring smoother engine operation. Additionally, it increases lubricity, which reduces wear and tear on engine components and prevents rust and corrosion, extending the engine's life.

Hot Shot's Secret Everyday Diesel Treatment is particularly beneficial for those seeking improved engine performance, fuel stabilization, and protection against rust and corrosion.

The SeaFoam SF-16 Motor Treatment is a popular choice in the automotive market. This product comes in a convenient pack of three 16 oz. cans, making it easy to use and store. It ranks #2 in Fuel System Tools on Amazon.

This treatment can be particularly beneficial for those looking to clean and lubricate fuel systems, stabilize fuel, and improve engine performance. It is versatile and can be used in both diesel and gasoline engines, making it a handy option for a wide range of vehicles.

The product’s strength lies in its ability to clean injectors and improve lubricity, which can lead to smoother engine performance and longevity. For users specifically seeking anti-gel properties or cetane improvement, additional products may be required. The SeaFoam SF-16 is a reliable fuel treatment option, particularly strong in cleaning and lubricating fuel systems, with some limitations regarding specialized diesel additive features.