Backwards compatible – when new oil specifications are also suitable for older engines
In lubricant technology, the term backwards-compatible refers to the ability of an engine oil, transmission oil or lubricant to be used in older vehicles or machines, even though it was developed according to a newer approval or specification. Backwards compatibility plays a central role in the selection of oils in everyday life, because not every new standard automatically replaces the previous one – but many modern oils are deliberately formulated to cover earlier requirements.
Why is backwards compatibility so important for approvals?
Vehicle fleets, workshops and end users are often faced with the question: “Can I use a new oil with the current standard for my older vehicle?” Backwards-compatible specifications – such as API, ILSAC, ACEA or manufacturer specifications – offer planning security and avoid mistakes when selecting oil.
BASINOL products are clearly labeled and transparently indicate which older specifications are covered by a new release.
What does it mean when a specification is backwards compatible?
If an engine oil meets the API SP specification, for example, it is automatically approved for vehicles that require API SN or SM – this specification is therefore backwards compatible. The manufacturer guarantees that the oil at least meets or exceeds all requirements of earlier versions, in particular with regard to wear protection, deposit behavior and exhaust gas standard compatibility.
Are there differences between backwards compatible and explicitly approved?
Yes. A backwards-compatible specification technically replaces earlier standards, but is not always formally approved by every manufacturer. For example, an oil can technically fulfill API SP, but not have an explicit “MB 229.51” approval. Therefore, in the case of OEM approvals such as VW, Mercedes-Benz, BMW or Ford, attention should always be paid to the exact designation in the technical data sheet – as with the tested approvals of BASINOL oils.
Are there also specifications that are not backwards compatible?
Yes, especially in the case of low SAPS oils or oils with reduced HTHS viscosity. For example, a modern 0W-16 with ILSAC GF-6B is not backwards compatible with older engines that rely on 5W-30 with a higher HTHS value, for example. The wrong oil can lead to engine damage, loss of performance or loss of warranty. Therefore: Always check backwards compatibility in combination with the manufacturer’s specifications.
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