Xtra is our new formula "covalizer" for diesel cars and trucks one 16 ounce can in your 150 gallon tank may increase your mileage by as much as 23% by itself.  This is based on our test on a 2005 Pickup with a 5.7 liter cummings engine.  It went from 19 mpg to 26 mpg on our scientific orange test (comparing oranges with oranges).

 

Xtra breaks the covalent bonds of diesel fuel to make it more vaporizable such that it burns more completely.