The part numbers are different because its specified in the contract that they are different....<div>HOw do I know that the contract specifies a different part number? Because all lubricant blenders who toll blend for other companies have similar provision in their contracts and it assists them in tracking their SKU's.</div><div>the lubricant formulation may be similar to BP BioLube 2T but the packaging and label is different therefore its a different SKU and gets a different part number</div>