I've had a number of sports cars in my day, from Audi S4s, to a number of M3s. I also have a turboed track toy (s2000) so Im no stranger to speed and performance. I find the performance very impressive. The way it climbs from say 5mph to 100mph is relentless, and will absolutely trounce the 3.6L in a highway pull. Take an unlimited wrangler, and add 1000lbs of weight in armor, bumpers, winch, compressors, tools, cargo, etc, and the diesel will absolutely annihilate the v6. The GC is compliant and quiet, so the speed isn't as apparent (similar feeling to say an AMG S class) but if you watch the needle climb it doesn't stop. Our horrible NYC commuting averages in the 22-24mpg, but long highway drives, easily mid 30s, and I've gotten 41 before trying to hypermile from NY to DC and back. Our DEF consumption is around 8-10 gallons per 10000 miles, but I think the fact that you're in hot texas makes consumption far greater. Oil changes, the dealer we bought it from (long island) actually does free oil changes for life, but most of the time, we take it into a local dealer (nj) just because it's close to the house. To me, the performance is worth the slightly increased cost of upkeep, and in my personal opinion, a wrangler is exactly the type of vehicle you'd want a diesel in....to turn the big tires, and carry the big heavy loads, without any real decrease in performance or mpg (not that I care about mpg other than on adventure travel.)