Detergents – cleaning additives in engine oils
Detergents are special additives in engine oils, gear oils and industrial lubricants that bind and neutralize deposits, soot and acids in the oil. They ensure that the engine remains clean and wear caused by contamination is minimized. Detergents play a particularly important role in heavily loaded engines, as they prevent the formation of sludge, carbon deposits and acid-induced corrosion.
Why are detergents important?
During combustion, soot particles, unburned fuel residues and acids are produced which can contaminate the oil. Detergents help with this:
– Prevent deposits and keep metal surfaces clean
– Neutralize acids caused by fuel combustion
– Maintain oil quality in the long term, allowing longer change intervals
Modern high-performance oils contain precisely balanced amounts of detergents to ensure an optimum balance between protection and performance.
What is the difference between detergents and dispersants?
Detergents actively clean metal surfaces, while dispersants keep fine dirt particles in suspension so that they do not clump together or settle. Both additives work together to keep the oil clean.
Can too many detergents be harmful?
Yes, excessive dosing can lead to increased ash content, which can build up in particulate filters or exhaust aftertreatment systems. Therefore, low SAPS oils are optimized for modern vehicles with particulate filters.
Why are detergents particularly important for diesel engines?
Diesel engines produce more soot and combustion residues than gasoline engines. High-quality detergents prevent carbon deposits from settling in the engine and reduce the risk of oil thickening.
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