I’m not trying to stick up for Dodge but I’m up in New England (mass)and they have been pre-treating the roads with liquid calcium chloride type spray.They put it on a few days before the snow and anything on the vehicles that don’t have a good paint on them (frame, calipers, driveshaft, etc)turns to pure rust.my 2016 JK Jeep I go under the car every spring and blast all the rust spots with rattle cans to keep it from getting eaten away.
You just can't OVER-STATE the damage this crap does. It's WAY WORSE than regular road salt alone. It goes on as a liquid and it's ability to find it's way into every opening available is CRAZY bad on a wet road.
Fluid Film is my solution for my truck too but cars are way tougher. Much harder to get to areas like the back of fenders.
Ultimately........this thread and the topic illustrate the reason so many of us up here in the North park our cars each November at the first signs of "treated" road surfaces.
It makes a huge difference.......and attempting to save a winter use vehicle is really a losing effort. You either do NOTHING and watch it happen quickly or you take steps to delay the inevitable to a CRAWL but it still happens over time anyway.
Safety vs longevity is the issue here. It's not about how Dodge builds the car.
As much as I hate what happens to year around driven vehicles up here........we've also seen what happens down south in a freakish cold snap complete with just a little frozen rain or snow. If you live in Atlanta maybe a couple of days where city just shuts down each winter is a reasonable trade off to save the cars and trucks........up here in a Cities like Boston, New York or Chicago........that same shut down would be measured in entire months.
No point whining about it.......just get another vehicle for the winter or admit that maybe the Challenger and cars like it are a poor choices for you if this isn't an option or possible.