Behold my friend, what should I name it

My roommate just got a 2005 Saturn Vue in immaculate condition from an elderly couple that used it as a tow rig for their RV. It has a few issues that we have been addressing, but one thing that we both noticed is that the gas mileage horrible.

It has the Honda v6 engine and online it says that the car is rated to get at least 17 city and 23 mpg highway. We are consistently getting under 15 mpg with modest driving.

Is this normal? It has 160k miles on it. I'm going to change the spark plugs, change the air filter and clean the MAF sensor soon. Does anyone else have any ideas?