Hi,
I just started experiencing that startup whine. I have had my Boxster since October 2015 and I started noticing the whine about a month ago. From what I've read the outside temperature doesn't have anything to do with it. Other than the startup whine it is running perfectly. And, I am or maybe was planning on putting about 600 miles on it this weekend. Looking for advice from those of you with more owner experience. I do have another vehicle to make the trip, just would prefer the more fun one.