Just went to one of the 2 Chevron stations we have in our town and noticed the pump has a B20 label on it. I’m wondering if this is OK to run in my Dodge 2500 Cummins? Any experience with B20?

I like it in my old D-7, Case loader and Case excavator. Much higher lubricity (you can actually feel it rubbing it between your fingertips unlike highway #2 which feels gritty) and in Lake Co you shouldn't have any problems with cold weather.

I’ve read that it’s better for the truck but…if you have a lot of miles on the truck or it is older it can dissolve a bunch of sludge and gum up the works.

Yep, be prepared to change out your fuel filters a few times until the system is cleaned out. Depending on the year model, B20 may not play nice with SCR equipped diesels. If memory serves, Chrysler specced B10 or B15 only.