I have a 2018 M3W and have added an inline oil cooler under the bonnet with a temp controlled fan and an oil temp gauge. It also has the urban cooling fan. In May went to the DGR in Charlotte NC and the temp was in the mid 90's (and humid). Never went slow enough for the urban fan to work, but never fast enough to get good air flow. The oil temp was between 240-250! WOW it looked crappy when I changed it out!
BTW, sorry I have not been on the site much, I retired last year and I do not seem to have as much free time!
