Ok, for what it's worth to those interested in the 4Xe, I drove it 1688 miles over 3 weeks. About 65 of those miles were off road, maybe 20 were pretty challenging for a stock rig.
I charged the rig only twice, so every bit of driving for the most part was petrol and never stop-and-go. One off-road trip used up one of those charges (VERY quickly off road), so really I ran 99% petrol.
Over 1688 miles I used 81.15 gallons, so 20.8 mpg average over those miles. The computer pretty consistently said I was averaging 22-24 mpg. I rarely used the air con, so I'm not sure what the impact of that would be.
Overall, I have to say I really wasn't impressed with the drive train. I loved the Jeep and really enjoyed driving it ( two pedals aside), but the drivetrain really was underwhelming; reminding me of my first new car: a 1993 YJ 4 cyl 5 speed.
Obviously it is designed to be an electric car. In pure electric it actually is fun to drive and had a bit more power. Driving it as a short commuter, a car for just around town or for very short trips I think it would be fine. But as a daily driver without plugging it in, it leaves much to be desired.
The 2 litre is pretty underpowered and (at least it seems to me) is fairly thirsty. The engine turns off and on almost incessantly: in the mountains and in town- constantly, on the highway only on downhills or when you let off the throttle. There is a noticable surge, similar to an auto downshifting, when the engine kicks in.
I'm not sure how it compares to the 392 or the diesel, but my wife's Tahoe diesel 4wd averaged 31.7 on the tank we used to and from the airport. My Silverado diesel 4wd long bed High Country with tow mirrors has averaged nearly 27 mpg over 53,000 miles. My friend here in fla has a 2021 wrangler 4 door 6 speed manual which he only drives in the city and told me he averages 18 mpg. For all the complexity of that hybrid system, I really expected better fuel economy.
I would foresee MANY issues as these age.