Low SAPS oils are engine oils with a reduced proportion of sulphated ash, phosphorus (P) and sulphur (S) – hence the name “SAPS”. They were specially developed to protect modern exhaust gas aftertreatment systems such as diesel particulate filters (DPF) and catalytic converters and to extend their service life.
Relevance in the industry
With the increasing use of emission control systems in vehicles – both passenger cars and commercial vehicles – low SAPS oils are a key component of modern engine oils. They help to comply with legal emission limits while ensuring performance, engine protection and compatibility with sensitive emission control components. In the development of high-quality lubricants, companies are increasingly relying on low-SAPS technologies to master the balancing act between environmental regulations and efficiency.
Why are low-SAPS oils important for diesel particulate filters?
Normal engine oils with a high SAPS content can leave residues that clog the filter. Low SAPS oils prevent this as they contain fewer ash-forming substances – the filter remains functional for longer.
Can I also use a low SAPS oil in a gasoline engine?
Yes, many modern gasoline engines are compatible with low SAPS oils, especially if they are equipped with a catalytic converter. However, it is important to check the manufacturer’s specifications.
How can I tell if my vehicle needs low SAPS oil?
Pay attention to the specifications such as ACEA C1-C5 or manufacturer approvals (e.g. BMW Longlife-04, MB 229.51). These indicate suitability for vehicles with exhaust aftertreatment systems.
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