Cetane Improver is an additive used in diesel fuel to enhance its combustion quality. It works by increasing the cetane number, which measures how quickly the fuel ignites in the engine. A higher cetane number leads to smoother engine operation, reduced emissions, and improved fuel efficiency. These additives are particularly beneficial for diesel engines, as they help reduce engine noise and improve cold starting performance. Common types of cetane improvers include 2-ethylhexyl nitrate and di-tert-butyl peroxide. By using cetane improvers, diesel fuel can perform better, leading to a more efficient and environmentally friendly driving experience.