SAPS – additive content in engine oil and its effects
SAPS stands for Sulfated Ash, Phosphorus and Sulfur – in other words, sulfated ash, phosphorus and sulfur. These components originate from the additives in the engine oil and have a significant influence on the lubricating effect, oil ageing and compatibility with exhaust gas aftertreatment systems such as particulate filters and catalytic converters.
What does SAPS mean for your engine oil in practice?
In modern vehicles with DPF (diesel particulate filters) or SCR catalytic converters, an excessively high SAPS content can clog or damage the sensitive systems. This is why there are now so-called low-SAPS or mid-SAPS oils, which specifically contain lower levels of ash formers without sacrificing wear protection.
BASINOL engine oils are formulated to offer classic, low or mid-SAPS levels depending on requirements – always tailored to manufacturer specifications and emission systems.
What are SAPS made of – and why are they contained in the oil at all?
SAPS are created from certain additives that give the engine oil important properties:
– Phosphorus & sulphur improve wear resistance
– Sulphated ash results from metal compounds in cleaning or anti-corrosion additives
These substances are technically useful, but can cause problems in modern exhaust gas aftertreatment systems if they occur in too high a concentration.
What is the difference between Full-SAPS, Mid-SAPS and Low-SAPS?
– Full SAPS oils: Classic additives, not suitable for vehicles with DPF
– Mid-SAPS oils: Reduced SAPS content, suitable for many modern diesel and petrol engines
– Low-SAPS oils: Particularly exhaust filter-friendly, e.g. according to ACEA C1, C2, C3 or API SN Plus / SP
BASINOL offers low-SAPS oils for vehicles with Euro 6 emission standards or sensitive particulate filter technology, for example.
Can I fill a full SAPS oil into a vehicle with DPF?
We strongly advise against this. The higher SAPS content can lead to rapid loading or irreversible damage to the particulate filter. The result would be higher exhaust back pressure, loss of performance and expensive repairs. Always pay attention to the oil specification recommended by the vehicle manufacturer – and if in doubt, use a tested low SAPS product such as BASINOL.
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