Hey David,
As Tracy said, glad you're here, but unfortunately, the gadgetman groove won't work on a diesel: throttle plate equipped fuel systems only. Aa again Tracy suggested, try a HHO system: diesels love them. Although I doubled my mileage on my Mazda (gas) with HHO, the research indicates that diesels have consistently higher and more constant mileage readings that gas.
Anymore questions, drop a line.
Luke
Gadgetman Saskatchewan