If you want to improve the diesel mileage on your vehicle, then try to install a fuel saving gadget. As a suggestion, you can try diesel bio fuel. The components of this fuel are environment friendly. It is made of organic material such as sugar cane and sugar beet. So instead of using crude oil to produce the fuel, these are the ingredients being used. It is then made by breaking the above ingredients into short chain methyl or ethyl alcohol. Then it will be mixed with the traditional diesel fuel to vary blends or grades. You can read more on the process on how the formula is created.