We are very pleased with the results that we are getting with two systems that we installed on our two Trucks. The installation was very straightforward and we did not have to do any modifications to the engine. We installed a system on a 2003 Freightliner with an ISX Cummins Engine. The Fuel mileage has increased from 5.8 miles per gallon to 6.3 miles per gallon. That is an increase of 8.4% in miles per gallon. The second system was installed on a 2007 Peterbilt with an ISX Cummins Engine. The Fuel mileage has increased from 6.3 miles per gallon to 6.8 miles per gallon. That is an increase of 7.9% In miles per gallon. We are currently averaging almost 3,000 mile per week per truck. At this rate and diesel averaging about $3.75 per gallon, we are saving over $175 per week per truck. We have also seen a slight increase in power. Based upon our savings, we are purchasing of the systems.