10 Best Diesel Fuel Additive 2025 in the United States

The Hot Shot's Secret Everyday Diesel Treatment is designed to enhance the performance of diesel engines. One of its standout features is the ability to boost cetane numbers by up to 7 points, which can significantly improve engine power, performance, and fuel economy. This makes it an ideal choice for those looking to get the most out of their diesel engines, whether for everyday use or heavy-duty applications. The additive also increases lubricity, helping to prevent rust and corrosion, which is crucial for maintaining the longevity of engine parts.

Another noteworthy feature is its ability to stabilize fuel and disperse moisture, preventing common issues such as fuel gelling in cold temperatures and water contamination. The inclusion of a detergent additive ensures that the fuel system stays clean, promoting better engine efficiency and reducing the risk of deposits that can hinder performance. However, some users may find the price point a bit high compared to other diesel additives on the market. Additionally, the 16-ounce bottle may not be sufficient for larger fuel tanks, requiring more frequent purchases.

Despite these minor drawbacks, this additive ranks #1 in Diesel Additives and has a strong reputation for quality and efficacy. It is a reliable option for diesel engine owners seeking a comprehensive treatment to enhance their vehicle's performance and longevity.

Hot Shot's Secret Diesel Extreme diesel fuel additive offers several benefits for diesel engine maintenance. It is designed to clean the entire fuel system, including fuel injectors, pumps, and pistons, which can enhance engine performance and longevity. The additive boosts cetane levels by up to 7 points, which can improve fuel efficiency and engine power, making it beneficial for those looking to optimize their vehicle's performance.

Additionally, it contains lubricity enhancers that reduce wear and tear on engine components, and an anti-gel additive to prevent fuel from gelling in cold weather, ensuring smoother starts in winter. The inclusion of detergent additives helps in removing stubborn deposits and varnishes, keeping the engine running smoothly. Its water demulsifier and stabilizer properties also contribute to dispersing moisture and preventing rust and corrosion, adding to the durability of the engine.

One of the standout features is its ease of use; a simple application of 8 ounces per 20 gallons of fuel every 6,000 miles makes it convenient for regular maintenance. If you are looking for a reliable diesel additive to clean, protect, and boost your engine's performance, Hot Shot's Secret Diesel Extreme is a strong contender.

The Power Service Diesel Kleen+Cetane Boost is a diesel fuel additive aimed at improving the performance and maintenance of diesel engines. One of its key strengths is its ability to clean dirty injectors and prevent injector sticking in both High Pressure Common Rail (HPCR) and older diesel systems. This ensures smoother engine operation and potentially extends the life of the fuel injectors. Additionally, it removes both internal and external deposits on fuel injectors, which can help restore lost power and improve fuel economy. This can be especially beneficial for users looking to maintain their vehicle's performance over time.

The inclusion of Slickdiesel Lubricator is a notable feature, as it provides extra protection for fuel pumps and injectors against the increased wear caused by poor quality Ultra Low Sulfur Diesel (ULSD) fuel. This can be an important consideration for users who are concerned about fuel quality. The additive is effective in all diesel fuels, including ULSD, biodiesel, and biodiesel blends, making it versatile for different types of diesel engines and fuels.

The product's relatively high price point, given that it comes in a pack of 9, might be a consideration for budget-conscious consumers. The product's packaging dimensions and weight indicate that it is relatively bulky, which might be a drawback for users with limited storage space. The Power Service Diesel Kleen+Cetane Boost offers several strong features for improving diesel engine performance and protection, but potential buyers should consider the cost and storage requirements.