This is a great combo pack for saving money.  The 16oz bottle can be used to refill the 8oz bottle making the combo pack a very cost-effective option.  This combination of bottles will treat 960 gallons of gas or 600 gallons of diesel.
 
Each bottle has a built-in measurement chamber for easy treatment of tanks.  Keep one in the car and the other in your truck.  We guarantee you will save more on fuel and maintenance than what our products cost, and your vehicles will run much better!