10 Best Diesel Fuel Additive 2025 in the United States

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.

The Howes Diesel Treat 64-Ounce Anti-Gel and Diesel Fuel Lubricator is a versatile and reliable additive for diesel engines, particularly beneficial during the colder months. It excels in preventing fuel from gelling, making it a trusted choice for those in extremely cold climates. This product is also designed to enhance lubricity, which is crucial for the longevity and performance of diesel engines, especially given the challenges posed by Ultra Low Sulfur Diesel (ULSD) fuels. By adding lubricity, it helps protect injectors, pumps, and upper cylinders, potentially extending engine life and improving performance.

Additionally, Howes Diesel Treat boasts a detergent additive that tackles carbon deposits, which can degrade engine power and efficiency. This feature aids in maintaining optimal fuel economy and engine performance, providing a financial benefit over time. One of the standout features is its water demulsifier, which safely removes water from the fuel without using harmful alcohols or solvents. This helps prevent issues like fuel filter icing and further protects engine components.

However, the product is relatively lightweight at 0.01 ounces per bottle, which might seem confusing compared to its liquid volume of 64 fluid ounces. Potential buyers should also consider the storage space required for the casepack of six bottles. In conclusion, Howes Diesel Treat is a well-rounded diesel fuel additive that offers multiple benefits, particularly for those who frequently operate diesel vehicles in cold weather. It addresses key concerns like fuel gelling, lubricity, deposit prevention, and water removal, making it a comprehensive solution for maintaining diesel engine health and performance.

Opti-Lube XPD All-Season Diesel Fuel Additive is designed to keep diesel engines running smoothly by addressing several important areas. It effectively improves lubricity, which helps protect your engine’s fuel system from wear, especially important for modern low-sulfur diesel fuels. The additive also boosts fuel economy, meaning you get more miles out of each gallon, which is a big plus for anyone using trucks or heavy equipment. It cleans fuel injectors by removing buildup, helping your engine run more efficiently and reducing emissions. Another key feature is its anti-gel capability, allowing diesel to flow properly down to about -10°F, which is great for colder climates. The product also acts as a water demulsifier, separating water from fuel to prevent damage and extending the lifespan of stored diesel.

Additionally, it stabilizes fuel, doubling its storage life so you don’t have to worry about degradation over time. A practical bonus is the included hand pump and travel bottles, making it easy to use on the go. While it performs well across these areas, the anti-gel protection is limited to moderate cold temperatures (-10°F), so in extremely cold regions, additional measures might be needed. This additive is suitable not just for trucks but also for farm and construction equipment, making it a versatile choice for most diesel users looking to improve engine health and fuel efficiency.