I had issues with gelling on a long trip last year from Ohio to Montana with my brand new 2500HD; heading thru Indiana into a 30mph headwind and -20ish ambient temps. I learned pretty quick that I didn’t put in enough Power Service (white bottle) before is left; the trick with anti-gel is to add it before temps drop. It didn’t get bad enough to shut the truck down, but it sounded like my turbo was crapping itself any time I tried to lightly apply power. I got lucky and was able to pour in some Power Service 911 at a truck stop; that stuff works like magic. Throughout most of that trip; at least into Minneapolis, every truck stop I pulled into was out of anti-gel, and there were a lot of stopped trucks along the way. I know the fuel is supposed to be blended, but it sure as heck wasn’t blended enough. The farther you get out west, I was surprised seeing the options available for fuel- 50/50, #1, & #2. Once I got out past the plains, I used 50/50 or #2 as often as I could if the temps would allow.
So there’s my long story as a new diesel owner and my experience with gelling. Would I let it keep me from buying another diesel? Hell no.