Do I get to add the 400 miles I've put on the loaner since my engine blew? Seriously it is a comfortable vehicle to drive surprisingly. I do about 100 miles a week for work and a another hundred getting to the trails and back. They gave me a Town & Country fully loaded as a loaner and it isn't as comfy to drive. Feels like I'm piloting a whale from an office chair.

 

Just about to turn 12k on my '12 that I got in July! I was commuting about 500 miles to/from work every week PLUS driving another 100-200 miles a day FOR work. Luckily I don't have to do that anymore and I moved and my commute is now 20 miles round trip. The only good thing is my 33s are wearing pretty fast and I'm starting to look at what 35s I want!

 

I have 35s heavy Nitto Trail Grapplers (great tire) on my 2009 Rubi with 4.10s and the best ever I got was about 18mpg on the highway. City is about 14-15, but I do step on it

 

You have a 6-speed manual.... 4.56's, Unless you are playing in the rocks with 37's...
And if you really want to climb rocks.. Change your 4Low TC out.
There is only about 150 rpm difference between 4.56's vs. 4.88's.. sounds like you'll be in sixth gear more... than being in first gear climbing rocks... You will be fine..