My '97 Honda Civic LX has always gotten great fuel economy. But here recently, I've noticed it hasn't been so great. So I decided to drive perfectly normal to test it. After I was completely out of gas, I put in 1.75 gallons of gas. I reset the trip odometer and went 15 miles. After that, I was almost out of gas because it was difficult to start. It has new plugs, wires, distributor cap and rotor button and does not hesitate or misfire at all. She runs beautifully but gets such horrible mileage now. Any idea why?
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