I also have an 04 Ram 2500 that is virtually rust free. I use boiled linseed oil and only need to apply it every other year. Good thing about that stuff is that it won’t wash off when you go through the car wash with underbody spray. I tried fluid film on the wife’s Durango after we bought it but it washed off too fast. It’s a 2012 and is rustier underneath than my 04 Ram. Linseed oil only from now on. The **** they put on the roads here in PA in the winter absolutely destroys vehicles.
View attachment 1715866083
