Ashless dispersants are chemical additives that are used to prevent the formation of deposits in engines and other machinery. They work by dispersing contaminants and keeping them suspended in the oil, which helps to keep the engine clean and operating efficiently. The term “ashless” refers to the fact that these dispersants do not leave behind any ash or other solid residue when they are burned, which makes them ideal for use in high-performance engines and other applications where cleanliness is important.