Hey guys, I'm a happy new owner of a 2013 hatch but I'm running into a problem. My first gas tank got around 20 mpg ( total miles divide by how many gallons I filled up). That's fine but I filled up last night and drove only 45 miles all day and the tank shows less than 3/4 tank now. I drove conservative (shifting btwn 2500-3000) and the dashboard says I'm averaging about 22.3 mpg. I don't know what I'm doing wrong. I'm taking the same route to work I did all week. Any ideas of what can be causing this?