My 2008 non-B9 Tribeca is great but I'm thinking about getting rid of it because I'm getting worse gas mileage than my husband's V8 Chevy truck! Any ideas what could be causing it? I have new, properly inflated tires. I just bought it about 6 months ago, so I unfortunately don't know too much else about the history. It's only got 107k on the odometer. Does this seem like a normal fuel economy? I am a little heavy footed, but not terrible. I also live in a small town where trips are usually never over 5 minutes.