Dual UOM requirement on Lubricants consumption

Hi ,

AS per our buisness requirement we are searching to map the dual UOM for particular lubricant items in the way of Number as Primary ( which is to be used in Purchasing Module) and Kilo grams as secondary to use in BOM & WIP Modules . But its come to know that its not possible to track in Dual UOM for BOM allowed items.

It s really appreciable if any one suggest how can we map the same with our standard functionallity.

We need to procure the Lubricants in Barrel as NUmbers . and we have to use it in grams OR Kilao Grams in Work In process.