just bought a 2011 Sport 4x4 with 5 spd, AC & 17" wheels almost 2 weeks ago...
w/ 500 miles, I got 25 mpg. That was combined mileage. I am happy, but wonder if it will improve when I put more miles on it and I get used to it more and find the comfortable shift points...
manual are only FDI, but it's not an OFF-ROAD vehicle for me...
I read on the patriot forum that FDII is pretty hard on mpg, but as I mentioned that wasn't even an option for me... I prefer to row the gears.
I'm certain I could have "lived" with FWD, but I felt if it was a JEEP it need to be 4x4.
Not sure how familiar you are with the Patriot drive train set up:
FDI is actually a part time AWD set up. Full time FWD, detects slippage the rear, wheels engage.
What allows JEEP to call it 4x4, the rears can be engage at will, by means of a switch on center console.
Also FDI does not have 2 spd transfer case (LOWER GEAR).
FDII I believe is similar, but has a low gear. As well as hill descent and a couple other things (didn't do much research into them)