What Weight Oil
I live in SE Virginia and occassionally make it to Bonita Springs. I use MOBIL-1 15W50 other companies have 20W50 but makes no difference. I ran my oil change schedule (one year or 15,000 miles with filter every 5,000 past the TECH guys at MOBIL and they said no problem). I am car sitting the kids 1990 325ic and that is the schedule we use, I also have a 1988 750il and the same schedule applies. After over 156,000 on the 325 and 135,000 ont the 750 I have no leaks and no problems.