Just going by dic. we drove to evansville last tuesday( about 90 one way) and it took $40 in gas to get there and back. Mostly going between 55-65 mph. Havent took throttle body off yet, but may have to, to see if it helps. Alos no ses lights, Just one a week or so ago for Coolant temp below thermostat regulating temp, Thats why i changed the thermostat.