Originally Posted by Turkeybaster115
I would add cooling ducts to my 335I, but I don't even have an oil cooler, so I don't know if that'll do any good.
FYI, since your in europe, your probably not getting very hot summers, in which to push your Z4's S54. Although germany did have some heat waves this summer, so I wonder if you "pushed it" at the ring on one of those days.
I have an MZ4 Coupe with S54 and I've pushed it at 115º F days in the middle of summer at a grueling track like Buttonwillow (lots of slow speed turns). Oil Temp never went above 260º F.