Fuel enhancements designed for diesel engines represent a broad category of products intended to improve engine performance, fuel economy, and overall system longevity. These formulations typically contain a mixture of detergents, cetane improvers, lubricants, and stabilizers. An example would be a product that claims to boost cetane rating, clean fuel injectors, and prevent fuel gelling in cold weather.
The value of these fuel treatments lies in their potential to address common issues experienced by diesel engines. These issues may include reduced power, increased emissions, rough idling, and fuel system corrosion. Historically, such products have been used to compensate for variations in fuel quality and to mitigate the negative effects of modern fuel formulations, such as ultra-low sulfur diesel (ULSD), which may have reduced lubricity.