As you know the saying goes penny wise pound foolish...
I've been running Royal Purple for 2 weeks now and when the tranny is warm I like the shifting but when it's cold outside <40 degrees, it isn't any better than what I had so next I'll order some official Porsche tranny fluid and flush it again. Just trying to solve cold shift issues - get's hard to put in gear for the first 2 minutes.
Thanks,
-Steve