I went 4 months on my mustang and the rims were disgusting but not as bad as my sonoma which went 14k miles without being washed. Good looking car though man
I went about 2 months or so back during the winter. With all the highway driving I was doing at the time, it was just aweful. Took forever to get all the crud off.
I didn't wash my car for almost 7 months one time. I was up at school. I just left the car in the parking lot behind my doom room. Sometimes I would even see my car for a couple weeks.