We just got back from our first trip with the X17Z and it was fantastic! We'll be going back up to Maine for Memorial Day.
This was my first time towing anything and as you can imagine I was surprised about the gas mileage I was getting - 10 MPG.
Our tow vehicle is a 2011 Mazda CX-9 Grand Touring AWD. It's properly maintained, good tire pressure, V6 270+ HP, AWD, etc. I was averaging 60 MPH for a 100 mile trip, all relatively straight and flat.
I realize the CX-9 isn't the tow vehicle of choice, but is 10 MPG something I should just get used to? We brought our two small kids and a small dog in the vehicle. The trailer had no water, tanks empty, but included the "normal" stuff you pack for a weekend.
Here's a picture of the rig all setup leaving the campground.