I get almost exactly 15 miles to the gallon of gass on my daily driving D. I changed the O2 sensor on DMC Joe's recommendation as the frequency "buzz" was on constantly. Now it buzzes on and off, but I still get horrible (the same) gas mileage even compared to my automatic. While comparing my functioning d to this one I noticed that when I press the full throttle micro switch on this car the buzzing is constant, but the engine noise does not change at all. On my automatic when I press the switch the buzzing is constant and the engine revs up. I am concernd that my cylinders are getting "gass washed" and that is why I am also burning a little oil. plz give me suggestions P.S. THe fuel accumulator and o2 sensor have both been changed within the past year. Joe Palatinus VIN 17167 6808