KKBB
Senior Member
Everywhere in Iowa that I have seen uses straight salt. The IDOT does anyway, so all state highways and interstates got straight salt.It does look like the bottom of your trucks gets a beating from the salt! I thought Ohio salt was killer but that beats it! I liked when I lived in Iowa they used a 50/50 salt sand mixture so the rusting didn't seem as bad then. About 2 or 3 times a year I also spray the whole underneath of my truck with WD-40. Seems to help a lot.