10 Best Diesel Cleaner 2026 in the United States

The Power Service Diesel Kleen + Cetane Boost is a diesel cleaner that offers several benefits, especially for those looking to improve their diesel engine's performance. One of its main strengths is its ability to clean dirty injectors and prevent injector sticking in both modern High Pressure Common Rail (HPCR) systems and older diesel systems. This can lead to a more efficient engine operation and less maintenance over time. Another notable feature is its cetane boosting capability, which can boost cetane numbers up to 6 points. This translates to engines running smoother, with quicker cold starts and less power lag, enhancing driving experience.

It's also versatile in its compatibility, as it works with all types of diesel fuels, including Ultra-Low Sulfur Diesel (ULSD), biodiesel, and biodiesel blends. Additionally, its universal fit ensures it can be used with all diesel vehicles, making it a convenient option for various users. The product is easy to use and comes in a convenient 64oz bottle, with a six-pack providing ample supply for multiple treatments. Power Service, the manufacturer, has a good reputation for producing quality fuel additives, which adds to the product's credibility.

On the downside, users need to handle it with care due to its flash point of 49 degrees Celsius, implying it can be flammable. Moreover, while it offers significant benefits, its effectiveness might vary depending on the condition of the engine and the type of fuel used. This diesel cleaner is well-suited for diesel vehicle owners looking to enhance engine performance and longevity.

The Archoil AR6400-D Diesel Fuel System Cleaner is designed to clean various critical parts of diesel engines, including injectors, turbochargers, diesel particulate filters (DPF), and EGR systems. This broad cleaning ability makes it a versatile choice for those looking to maintain overall diesel system health. It helps restore engine performance, improve fuel efficiency, and smooth out idling, which can be noticeable benefits for everyday drivers.

One bottle contains 12 ounces and treats up to 40 gallons of diesel fuel, with a recommended use every 5,000 miles, making it straightforward and easy to follow. The product is compatible with all diesel systems, so it should work well regardless of your specific vehicle. For users of Power Stroke engines, Archoil suggests pairing the AR6400-D with their AR9100 Friction Modifier for best results on injector stiction issues, which means you might need an additional product for optimal care.

The cleaner has a positive reputation and has been available since 2014, though it comes in a single size without variations. This cleaner is a good fit for diesel vehicle owners who want a reliable and simple maintenance product that covers multiple engine components, while heavy-duty users might need complementary products for specialized problems.

Hot Shot's Secret HSS64Z Original Stiction Eliminator is a versatile diesel cleaner that can also be used for gasoline engines. It is designed to restore engine power and performance while reducing wear significantly. A standout feature is its ability to clean and lubricate various components in the oil system, such as HEUI injectors and turbos, which is verified by third-party testing.

This product can effectively restore nine out of ten failing HEUI injectors, contributing to better engine performance. It is a vehicle-specific fit, ensuring compatibility with many types of vehicles, which is convenient for users with different engine types. The concentrated formula requires careful attention to dosage and application to avoid any potential issues. Moreover, the product is relatively heavy at 3.89 pounds, which might be a consideration for some users.

Despite these minor drawbacks, the Hot Shot's Secret HSS64Z is a well-regarded option for those looking to maintain and enhance the performance of their engines.