* Cetane improvers: These increase the cetane number, which is a measure of how readily diesel fuel ignites. Higher cetane numbers lead to smoother, quicker engine starts, especially in cold weather, and reduced engine noise.
* Lubricity improvers: Modern, low-sulfur diesel fuels have reduced lubricity (the ability to lubricate), which can cause increased wear and tear on fuel injectors and other engine components. Lubricity additives compensate for this deficiency.
* Cold flow improvers: These additives help prevent diesel fuel from gelling (thickening) at low temperatures, ensuring smooth fuel flow and preventing engine stalling. This is particularly important in cold climates.
* Fuel stabilizers: These additives help prevent the fuel from degrading over time, reducing the formation of gums and varnish that can clog fuel injectors and fuel filters. They also help prevent microbial growth in the fuel tank.
* Cleaning agents: These additives clean deposits and sludge from the fuel system, improving fuel economy and engine performance. They can help remove existing varnish and prevent further build-up.
* Corrosion inhibitors: These protect the fuel system from corrosion.
Many diesel additives combine several of these functions into a single product. However, it's important to choose a quality additive that's compatible with your diesel fuel and engine type. Overuse or using an incompatible additive can actually harm your engine. Always refer to your vehicle's owner's manual and the additive's instructions before use.
