Al-Faraji Oil and Diesel Trading Company In UAE is a leader of supplying Commercial and Industrial customers in UAE with the very best diesel, kerosene, Fuel oil, Furnace oil, and other petroleum products available today. Refilling your tank can be a very easy method to eliminate contaminants. However, refilling the tank when the particles or some previous diesel is present in the tank is the most inappropriate thing you can do. So, empty your diesel tank before you refill it.