FUEL INVENTORY

Dear Guru

I would like to map process of procuring the fuel for Shipping company. Customer is having following requirement

They have 8 types of material i.e. different types of fuels.

1.They require PO/PO, but they do not want to have inventory of the material.Consumption will be book directly through FI.

What business process should we have to track Fuel Inventory.

Regards

Manoj