I miss 97 leaded here at the coast. Mainly because of that healthy white-ish residue on the exhaust. Man the M5 had such a good looking exhaust pipe, especially after a good run.
I still remember a few year ago, I was still doing a lot of driving between Cape Town and Mosselbay. Drove up for weekends every second weekend. This was when I was still driving the 325is. First thing I did when I stopped after the long run, is to check out the colour on the exhaust.