Why is nobody talking in IRC ? <| sep |> I was thinking of doing the same . My 04 TJ Rubicon has always been driven minimally in the winter Boston but now my wife needs it to commute 5 miles each way to the train . In the past anytime it got to be above freezing I would take it to the carwash . This year I covered the underside with fluid film and plan on washing it every chance I get . The worst I have ever seen a vehicle rust form salt is my box truck . I had a 12 hour drive in a blizzard a couple years ago coming up from NYC . The truck was absolutely covered in salted slush from the highway . The following day the temps dropped to single digits and the slush was frozen all over my frame and lift gate . It had to be 3 or 4 weeks before it was above freezing again and everywhere that had the frozen slush was now rusted . So the moral is don ' t let it sit with the salt on it , you want to break the cycle , even if you are just going to get it salty again .