Transmission Dragging

I recently bought a new 2012 Taco 4x4 double cab TRD Sport with an automatic transmission. I've been averaging about 16 or 17 mpg since day one. I thought the mileage would get better as I put more miles on it but it hasn't. The truck has 1600 miles on it now. My neighbor has one similar to mine and claims to be getting about 20-21 mpg. I've noticed that it feels like it's dragging at freeway speeds above 60 mph or so. The RPM's aren't high but it feels like I am using excessive power at cruising speeds. I also noticed that it doesn't coast real well and slows down faster than a vehicle normally would when you take your foot off the gas. Has anyone else experienced this problem or heard of anything similar?

Thanks in advance.

 

Is your e-brake on....?

 

BFA - No the E brake is not on.

Whippersnapper - thanks for the info.