A base oil purchase specification tells a supplier what must be quoted and how acceptance will be decided. It is not a copied product table. The strongest brief connects the application, product identity, required properties, recognized test methods, applicable documents, packaging and change controls. Final limits must be approved by the buyer’s technical team and checked against the supplier’s current product documentation.
Identify the intended product and application
State the finished-product or process use, candidate base-oil group and viscosity grade. Where a named product is being considered, link the requirement to the current product page: Group II 150N, Group II 500N, SN150 or SN500. A product name alone is not an acceptance specification.
Define properties with methods and decision rules
- Name each property that is material to the application.
- State the required test method or an agreed equivalent.
- Use a limit, range or reporting requirement approved by the buyer’s technical authority.
- Define whether acceptance is based on the current TDS, the shipment COA, independent testing or a combination.
- State how rounding, units and retest results will be handled.
Do not take values from an unrelated family page. For Group III candidates, review the current product documents for Group III 125N, Group III 250N or Group III 10 cSt. For synthetic inputs, use the Group IV PAO category as a discovery route and request the product-specific data.
Specify the required document set
List the current TDS, applicable SDS and batch-linked COA where required, plus commercial and transport records relevant to the transaction. State required language, revision, identifiers and review timing. The document interpretation guide (Coming later) explains the role of each technical record, while Technical Data remains the source for current BAKLUCK documents.
Add packaging and logistics interfaces
- Packaging type and any buyer-approved material or cleanliness requirements.
- Marking, lot or batch references, seal records and package-count evidence.
- Named destination and quotation term, including the applicable Incoterms version.
- Receiving equipment or discharge constraints that the supplier must know before quoting.
Control substitutions and revisions
State that changes to product identity, source, manufacturing route, document revision or packaging require disclosure and approval where they affect the agreed requirement. Preserve the accepted specification and supplier confirmation with the purchase record. Use the RFQ template to carry the approved brief into quotation.
Return to the Base Oil Procurement Guide for supplier, quotation and logistics checks.
Request a grade-specific quotation
Send the intended application, candidate grade, required documents, packaging and destination. Current specifications and availability will be confirmed against the enquiry.