Yeah, I was referring to the old 4.0 I6, not the 3.7 V6 you have. Plus, keep in mind, I'm talking about towing close to the max rating, not a 2500lb trailer.
And breaking 20mpg combined is good for a brick. I've only broken 20 on an all-highway tank once
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Call me crazy, but I actually try for mpg with this Jeep:
Typical driving: Back in Rochester for school, driving is 60 - 70% city