Your Ford Expedition’s engine builds up carbon or varnish deposits when an incomplete combustion is brought about. Non homogeneous molecules are created in both gasoline and diesel fuel. Such molecules begin to cluster and grow and become trapped during combustion. In such conditions, air is unable to reach the trapped molecules and so they do not burn out completely. These molecules are instead expelled into the atmosphere or retained as carbon/varnish deposits inside your engine. In relation to this, your Ford Expedition 2003 – 2003 is fortunate enough to be equipped with a fuel saver that literally breaks the cluster of molecules apart, which otherwise could not break through a cluster. With a quality Tornado Fuel Saver, more oxygen can reach the individual molecule to complete the combustion. Putting up your Ford Expedition Fuel Saver on the supply fuel line will cause the hydrocarbon molecular clusters to separate and expand. More oxygen will then combine with the hydrocarbon molecules that are no longer in clusters. As a result, more efficient combustion in the firing chamber is attained. Since fuel will burn more efficiently because of the fuel saver, the result is less emission. A "cleaner and hotter" fuel burn can as well increase horsepower and overall engine performance. Your premium Tornado T57KI85 in stock can indeed speed up combustion and will burn more of the fuel that is normally exhausted as un-burned pollution. Get it here from our 24-hour online store that offers special deals. You can use our toll free lines in case you need further details about this certain product.