2007 colbalt 2.2 ecotech getting bad gas mileage what could be the problem was getting 30 plus highway and 25 city now getting about 22 highway and 18 19 city any help would be appreciated did not try anything yet except change oil and filter but that is about it. don't know if maybe it is a filter issue or what
Jun 30, 2013 at 11:05 AM
