The coin op wash is also an option. Like the other two posters, I've done both depending on weather and time. As soon as it's warm enough, I'll get the hose out and start flushing everything out. Then I wash the vehicle a couple of time. Winter sucks. But start with good protection and you should be okay. I've used 845 over Powerlock for my winter package, and top off with OCW when I can after a rinseless