10 Best Diesel Fuel Additive 2026 in the United States

Hot Shot’s Secret Everyday Diesel Treatment (EDT) is a versatile 6-in-1 diesel additive designed to keep diesel engines running smoothly and efficiently. It effectively boosts the cetane number by up to 7 points, which can improve fuel economy and help with smoother acceleration, making it a good choice if you want better engine performance. The formula also cleans fuel injectors both inside and out, reducing deposits that can affect engine function. It enhances fuel lubricity, which helps protect critical components like pumps and injectors from wear and tear, potentially extending engine life.

In addition, this additive works to prevent rust and corrosion while stabilizing diesel fuel to avoid oxidation and degradation over time. It also acts as a water demulsifier, helping to separate water from diesel fuel which can otherwise cause problems in the fuel system. Using it regularly at each fill-up is simple — just add 1-2 ounces per 25 gallons of diesel. The product size (1 gallon) treats up to 3,200 gallons of fuel, making it economical for frequent use.

It has strong customer ratings, indicating reliability and satisfaction among users. While it covers many bases, it may not fully replace specialized additives if you face extreme cold weather frequently and need stronger anti-gel protection. Benefits like improved fuel economy and reduced maintenance may vary based on your engine type and fuel quality. This additive is ideal for diesel vehicle owners looking for an all-in-one, easy-to-use treatment that addresses common diesel fuel issues without having to buy multiple products.

The Archoil AR6500 Diesel Treatment is designed to enhance diesel fuel performance by addressing several important factors. It provides a strong boost in cetane number, which can help improve engine power and throttle response, making it suitable for drivers who want smoother and more efficient combustion. This additive also cleans and lubricates the fuel system, which is especially beneficial for modern diesel engines with high-pressure common rail (HPCR) systems that can be sensitive to deposits and wear.

Additionally, it acts as a stabilizer and helps separate water from fuel, protecting the engine from corrosion and fuel degradation over time. Sold as a two-pack treating up to 800 gallons, it offers good value for regular maintenance. The product does not explicitly mention anti-gel properties, so those in very cold climates might consider using a dedicated anti-gel additive alongside it.

This treatment is a solid choice for anyone looking to improve fuel efficiency, protect their injection system, and maintain clean fuel lines in all types of diesel vehicles.

Hot Shot’s Secret Everyday Diesel Treatment (EDT) is a versatile 6-in-1 additive designed to keep diesel engines running smoothly by improving fuel quality and engine longevity. It effectively boosts cetane levels by up to 7 points, helping with better fuel economy and improved engine responsiveness. The product also cleans fuel injectors both inside and out, which helps prevent performance issues and costly repairs.

Its lubricity enhancement protects critical fuel system components like pumps and injectors from wear. Additionally, EDT acts as an anti-gel additive by demulsifying moisture and stabilizes fuel to prevent oxidation, rust, and corrosion. This comprehensive protection aids in maintaining engine health, especially in varying weather conditions. The liquid is unscented and easy to use—simply add 1 to 2 ounces per 25 gallons of diesel at every fill-up.

Users value its effectiveness and convenience, which is reflected in high customer ratings. While one pack treats up to 800 gallons, frequent use is recommended for continuous benefits. This product is ideal for diesel vehicle owners seeking a reliable, multi-purpose fuel additive to enhance performance and reduce maintenance efforts without complicated steps.