10 Best Diesel Fuel Injector Cleaners 2025 in the United States

Hot Shot's Secret Everyday Diesel Treatment is designed to improve diesel engine performance and maintain engine health. This product features 6-in-1 functionality, acting as an injector cleaner and fuel system cleaner while boosting cetane levels by up to 7 points. This can lead to better fuel economy and reduced maintenance costs.

One of the standout features is its ability to clean both internal and external injector deposits, enhancing the lubricity of fuel to protect components like the pump and injectors, potentially increasing engine longevity. Additionally, it helps prevent rust and corrosion by demulsifying moisture and adding stability to the fuel.

The ease of use is a major advantage, as you simply add 1 oz. or 2 oz. per 25 gallons of diesel at every fill-up, making it convenient for regular use. However, users need to be diligent about adding it at each fill-up to see the best results. This product is especially suited for those looking to maintain their diesel engines regularly and not minding the routine of adding the treatment during each refuel.

Hot Shot's Secret Diesel Extreme offers a robust cleaning solution for diesel engines, designed to target and eliminate deposits in fuel injectors, which can significantly boost engine performance and fuel economy. One of its standout features is its ability to clean the entire fuel system, including valves, pumps, and pistons, providing a comprehensive approach to engine maintenance.

The inclusion of cetane boosters promises more efficient combustion and improved power, which is particularly beneficial for those seeking to enhance fuel mileage and performance. Additionally, it contains military-grade rust and corrosion inhibitors, making it a reliable choice for long-term engine protection. Ease of use is another strong point; simply add 8 ounces to 20 gallons of fuel every 6,000 miles, allowing for straightforward application without frequent intervention.

The concentrated formula ensures that even this infrequent application is effective. One consideration is that its relatively higher price point and the larger 1-gallon size may not be suitable for all users, especially those with smaller engines or less frequent use. Its unscented nature is a plus for those sensitive to strong chemical smells. This product is ideal for diesel vehicle owners who prioritize detailed engine care and are looking for a powerful cleaning agent to maintain and enhance engine longevity and efficiency.

The Power Service Diesel Kleen + Cetane Boost 64oz Bottle (6 Pack) is designed to enhance diesel engine performance by cleaning dirty injectors and preventing injector sticking. This product is compatible with both High Pressure Common Rail (HPCR) and older diesel systems, making it a versatile choice for various diesel engines. Its cleaning power is notable, as it helps maintain injector cleanliness, which can lead to smoother engine operation and reduced power lag.

Additionally, the product boosts cetane levels by up to 6 numbers, which can result in faster cold starts and better engine performance. This can be particularly beneficial for those experiencing sluggish engine performance or rough starts in colder weather. The Power Service Diesel Kleen is effective in all types of diesel fuels, including Ultra-Low Sulfur Diesel (ULSD) and biodiesel blends, further enhancing its compatibility.

The universal fit type ensures it can be used across different diesel vehicles, from trucks to smaller diesel engines. One downside could be the frequency of use; regular application might be necessary to maintain optimal injector cleanliness and performance, which could be seen as an added task for users. The ease of use can be a plus, as the product comes in a 64oz bottle that should be easy to handle and pour into the fuel tank. However, handling a 6-pack might require some storage space.