Find the "big mouth'" adapter that's in the Jeep (under the rear seat for a JT if I remember correctly), and use that. It's made to be used when the big nozzle at the truck stop won't fit your smaller filler hole.
Narrower tires in the winter for on-road driving will dig to the bottom and find pavement. Wider tires will float on top, which may be good for off-roading but won't be that good for on-road driving.
It's a set of gears that mesh and unmesh (when disconnected). Sometimes you get "gear clash", sometimes you don't. Very normal.
Just drive the Jeep a few feet and it will perform the lock or unlock as you change the mode.
I used Diesel Kleen in my 3.0L ED Grand Cherokee. Promptly thereafter (2,000 miles?), I had a Service Engine Soon light that came on, a sensor in the exhaust system was toast. I'm not saying the two are related, but I won't use it again, that's for certain.
I'm with you here. However, a good reviewer should be able to see that each vehicle is built to do a number of things, and judge/review them on how well they do those said things. You'd never put a Wrangler on a race track, for instance.
I would never expect a F350 dually to corner like a...
I'd reconsider getting the manual. I've had nothing but problems with mine. The clutch has been replaced 3 times and it's still very spongy. The ZF 8-speed auto is practically bulletproof - they even use a (modified) version in the Dodge Hellcat.