10 Best Diesel Cleaner 2026 in the United States

Hot Shot’s Secret Everyday Diesel Treatment (EDT) is a liquid diesel fuel additive designed for regular use to keep diesel engines running smoothly and efficiently. It works as a 6-in-1 treatment, cleaning fuel injectors, boosting cetane levels by up to 7 points, and improving fuel economy—this means your engine can get better mileage and perform more reliably. The product also protects your fuel system by preventing rust and corrosion, while helping to remove moisture and stabilize the fuel, which can extend engine life.

This cleaner is compatible with most diesel engines and is easy to use: simply add 1 to 2 ounces per 25 gallons of diesel fuel at every fill-up. The pack includes five 16-ounce squeeze bottles, which makes it convenient to keep on hand. Being sulfate-free, it’s designed to be gentle on your engine and fuel system components. Users rate it highly (4.7 out of 5 stars), reflecting satisfaction with both its cleaning power and its positive effects on engine performance. The brand, Hot Shot's Secret, is well-regarded in the automotive field, offering a money-back guarantee for peace of mind.

While this additive is effective for everyday maintenance and injector cleaning, it might not be strong enough for engines with heavy buildup or severe performance issues. Additionally, if you drive less frequently or use diesel outside of typical highway conditions, the benefits may be less noticeable. This diesel cleaner represents a solid choice for diesel vehicle owners looking for an easy-to-use, reliable product that supports engine health and fuel efficiency through regular treatment.

The Archoil Diesel Fuel System Kit is a two-step diesel cleaner designed to deeply clean and maintain diesel engines. It includes two products: a concentrated injector cleaner (AR6400-D) for a one-time deep clean and a larger diesel treatment (AR6500) for ongoing use at each fill-up. This kit works with all diesel engines, including modern high-pressure common rail systems, making it a versatile choice for many vehicles and equipment. Its cleaning power is strong, removing injector deposits to restore smoother engine response and better combustion.

Additionally, it improves fuel lubricity significantly, which helps protect sensitive fuel system parts like CP4 pumps. Another key benefit is that it boosts cetane levels by up to 8 points, helping the engine ignite faster and run more efficiently. It also supports Diesel Particulate Filter (DPF) health by reducing deposit build-up and lowering regeneration frequency, which can save fuel and maintain performance. The kit helps keep turbochargers clean, aiding acceleration and turbo response. The initial deep clean requires following a two-step process, which might be slightly more involved than single-product cleaners, but this approach ensures a more thorough restoration.

The brand has a strong reputation reflected in excellent customer reviews (4.8 out of 5 stars from over 2,700 reviews), making this kit reliable and trusted. The dosing is clear and easy to follow, though the upfront cost may be higher than some simpler additives. For those seeking a comprehensive diesel cleaner that also boosts engine performance and protects critical parts, the Archoil kit delivers a well-rounded, effective solution.

Hot Shot's Secret Everyday Diesel Treatment (EDT) is designed as a comprehensive diesel additive. This 6-in-1 diesel cleaner stands out with its promise to improve engine performance and maintain engine health. A key strength is its ability to boost fuel economy by increasing cetane levels by up to 7 points, which can lead to better fuel efficiency and reduced maintenance costs.

The product excels in cleaning both internal and external injector deposits and enhancing the lubricity of the fuel, safeguarding fuel system components like pumps and injectors, potentially increasing engine longevity. Additionally, it prevents rust and corrosion, which is essential for maintaining the health of fuel systems. The ease of use is another plus—just add 1 or 2 ounces per 25 gallons of diesel at every fill-up, making it convenient for regular use.

The product is engineered with a strong scientific foundation, ensuring reliability and effectiveness. However, a potential drawback could be the necessity of using it at every fill-up, which may feel cumbersome for some users. If you’re looking for a reliable diesel cleaner that boosts performance, protects your fuel system, and is easy to use, Hot Shot's Secret EDT is a strong option to consider.