Join Date: Mar 2010
Location: Ventura County, CA.
First question. Is the Check Engine Light (CEL) illuminated? How are you calculating your mileage? Were you getting 25 highway? If so, are you driving less highway now? Easiest ways to increase mileage, check tire pressures and keep them properly inflated. Stay as low on the RPMs as possible aka be easy on the go fast pedal.
If you do have a CEL get the codes read and post the codes for more help.
2009 Imperial Blue Metallic Cobalt SS/TC Sedan - "Stock":
2008 Victory Red HHR SS - Stock
2005 Chili Pepper Red Ion Redline - Stock
2007 Sunburst Orange Metallic LS Coupe - Sold