Darknight96 wrote:bad gas mileage is due to ethanol they put in the gas now since its getting colder to your gas in the tank from freezing. next time you get gas look on the pump, it should say up to 10% ethanol added. its basically gets drank like water. everybody's mpg goes down this time of year
idk about the rough idle though
Have also noticed my gas mileage has gone down, but has gone down since I don't drive the car much any more and since the winter blend gas has hit the gas stations.
Only getting about 130 to 150 miles on the first half of the gas gauge.
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