I just changed my transmission fluid to Mobil 1 synthetic 75W90. I'm at 12,000 miles. Shifting has a much easier action now. I'm curious to see if I still have the spoon-in-treacle feel on cold mornings though. What's the general consensus on Mobil-1 synthetic for the WRX tranny?
What is everybody else using, and what are you observations. What mileage did you change at?