10 Best Diesel Fuel Additives 2025 in the United States

Hot Shot's Secret Everyday Diesel Treatment is a versatile diesel additive designed to keep your engine running smoothly on a daily basis. One of its main strengths is boosting the cetane number by up to 7 points, which helps your diesel engine ignite fuel more efficiently. This can lead to better fuel economy and improved acceleration, making it a good choice if you're looking to enhance performance and reduce fuel costs.

It also acts as a fuel injector cleaner, removing deposits that can clog injectors, and improves fuel lubricity to protect vital parts like pumps and injectors from wear. This helps maintain engine health and can potentially extend the life of your fuel system. The product offers protection against rust and corrosion by removing moisture and stabilizing the fuel, which is important for preventing damage over time, especially if you live in a humid area or use your vehicle infrequently.

This additive is easy to use, with a recommended dose of 1 to 2 ounces per 25 gallons of diesel, suitable for regular use at every fill-up. It serves as an excellent choice for everyday maintenance and improving engine efficiency, though users in freezing climates may need to consider additional products for specialized cold weather protection.

Howes Diesel Treat 64-Ounce Anti-Gel and Diesel Fuel Lubricator is a well-regarded product in the diesel fuel additive category. Its primary strength lies in its ability to prevent fuel gelling, making it a reliable choice for those operating diesel engines in very cold climates. This product also adds lubricity, which helps protect key engine components like injectors, pumps, and upper cylinders, particularly beneficial for those using Ultra Low Sulfur Diesel (ULSD) fuels.

Additionally, it includes a detergent package that helps prevent fuel injector deposits, which can otherwise decrease engine power and fuel economy. Another notable feature is its ability to remove water from the fuel without using harmful alcohols or solvents, which can be abrasive to the system. The packaging comes in a convenient case pack of six 64-ounce bottles, which is suitable for regular users who need a consistent supply.

This product is particularly beneficial for diesel vehicle and equipment owners who face harsh winter conditions and need a reliable additive to maintain engine performance and longevity.

The Archoil AR6500 Diesel Treatment is designed to improve the performance and lifespan of diesel engines by addressing several critical functions. It offers a strong cetane number boost, which helps diesel fuel ignite more efficiently, leading to better engine power and throttle response. This additive also lubricates and protects the fuel system, including sensitive high-pressure common rail (HPCR) components, which can reduce wear and extend engine life. A standout feature is its ability to clean the post-combustion parts like turbos and diesel particulate filters (DPF), potentially preventing costly failures and reducing how often regeneration cycles occur.

The treatment ratio is convenient, with one 40-ounce bottle treating up to 400 gallons of diesel, making it easy to use regularly at every fill-up without dosing guesswork. It also helps maintain fuel system cleanliness and may improve fuel economy by restoring performance lost to deposits.

With high customer ratings and a solid reputation as a top diesel additive, this product is well-suited for diesel vehicle owners who want a comprehensive, maintenance-focused additive to improve combustion, protect key components, and keep injection systems clean. It fits best for those regularly using diesel fuel and looking to preserve engine health and efficiency rather than just a quick fix for cold weather or lubrication alone.