10 Best Diesel Fuel Additive 2025 in the United States

The Archoil AR6500 Diesel Treatment is designed to improve diesel fuel performance and protect your engine, making it a solid choice for anyone using diesel vehicles. It comes in a 40-ounce bottle that treats up to 400 gallons of fuel, so adding it at each fill-up is easy and convenient. One of its standout features is the ability to clean not just the fuel system but also the post-combustion parts like the turbocharger and diesel particulate filter (DPF), which can help prevent costly repairs and reduce how often your vehicle needs regeneration.

This additive also boosts the cetane number, which means your engine runs smoother and responds better. It lubricates the fuel system to reduce wear and helps stabilize fuel while separating water, which protects against damage and improves fuel efficiency. Users appreciate its effectiveness, reflected in high customer ratings.

While it offers broad protection and performance improvements, it may be priced higher than some basic additives, and for very old or heavily contaminated engines, it might not fully restore performance on its own. For modern diesel vehicles, this additive delivers multiple benefits in one bottle, making it a practical and reliable choice.

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.