Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 10W-40 found under by Mobil Oil Corp. The National Stock Number assigned to this part is 9150001160506, and the Federal Supply Class is 9150 Oil And Grease Cutting Lubricating And Hydraulic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 10W-40.