I'll tell you what you do have to worry about for those that live in area's that get snow and ice. Here in Ky. they have started using liquid stuff on the road's for ice . It destroyed the alloy gas door and plastic chrome cover on the tail gate of my 07 Ram 1500. And had to be replaced. Make sure you wash that stuff off as soon as possible. It didn't bother the chrome metal step board. The gas door on the Challenger is alloy I think .