Can you drive current Volvo motoes with vegetable oil? I would especially be interested in the S80/S60 and V70 machines. Especially the 2.5 liter machines. What do you have to upgrade? How much does it cost me with the cost, and how much does vegetable oil cost me, and what is all “plant oil” (food fat, sunflower oil…?) What does the conversion cost me, and afterwards the durability and mileage of the Swedes tank decrease? mfg olit