When Don walked into the service department trying to sell this "snake oil" I was certain of his ultimate failure. The possibility of increasing fuels volatility (fuels tendency to vaporize) by installing the ECO System on the fuel rail prior to the injectors, just didn't fit the "mechanical bill". After extensive back-and-forth technical banter, Don asked if I would like to give it a try. Knowing that my 2007 Jeep Wrangler had a characteristic throttle lag and slow curve response, especially in third gear, I took him up on the offer with intent to prove my point - by proving him wrong. After the installation we took a little drive. The Jeep, never meant to be a powerhouse, was behaving like one. In a feeble attempt to save face, I drove circles in the back lot trying to duplicate previous faltering. Needless to say, I had to swallow my pride and admit defeat. Volatility obviously increased. Though I have yet to check the fuel mileage, if RVP (Reid vapor pressure) has increased, conversely less fuel is wasted, and washing of the cylinder walls averted.
Patrick Stephens, Asst. Service Manager, Red McCombs Hyundai Northwest