I own a 1994 GMC Suburban with 183K miles on it. It recently started running real rough and would not stay would not idle. I would have to hold the brake and gas pedal at the same time in traffic. I was averaging 12-13 MPG. After adding Lucas Fuel Treatment, my truck now idles and drives better than it ever did. And I also Average around 18-19 MPG!!!! Now thats amazing coming from a Suburban. I am a customer for life now. Thanks Lucas for saving me money and helping me get my truck running better than ever.