Qualification has three connected objects
The supplier’s quality system, the additive product and the finished formulation each need evidence. A capable factory does not prove a specific package will meet an oil claim, and a successful trial batch does not prove long-term manufacturing control.
The qualification file should identify manufacturing site, raw-material controls, batch definition, test methods, specification limits, retain samples, traceability and complaint handling.
Build the technical file around risk
High-impact components and licensed formulations justify deeper compatibility and performance testing. Screening should cover storage stability, handling, base-stock compatibility and critical finished-oil properties before expensive tests begin.
Acceptance criteria should be written before results arrive. Post-hoc rationalisation weakens the decision and obscures which deviations were actually accepted.
Change control keeps qualification alive
Ownership changes, site transfers, raw-material substitutions, process changes and specification-limit shifts can invalidate previous assumptions. Contracts should define notification timing and the evidence required for requalification.
Ongoing review should include batch trends, non-conformances, performance complaints, audit findings and changes in the claims supported by the formulation.
Read the underlying documents.
- Code of PracticeTechnical Committee of Petroleum Additive Manufacturers in Europe ↗
- European Engine Lubricants Quality Management SystemServices to Associations and Industry in the Lubricants sector ↗
Source links and status were reviewed on 31 July 2026. Standards and regulations may be revised after publication.