How is it during the winter??Run Redline MT-90..
I've been using this for years, back in the day I bought the first year of the WRX here in the states. The trans would grind going into 1st, 2nd, & 3rd.
Took it to the dealer and they said that they were going to order new 1st, 2nd, & 3rd gears. OK cool I'll drive the car until parts come in.
So then I was talking to a buddy of mine that did a lot of track time with his cars. Said to go get MT-90 redline and that will fix all issues.
Replaced the fluid with MT-90 and no grinding or any issues what so ever! I could also shift faster and smoother. I never did get the tranny worked on at Subaru, told them to send the parts back. Never had another issue, and I drove that car hard!
Now the first thing I do when I get a new car is, swap out all fluids to Redline, trans and diff's.