Hello all, I have been using Mobil 1 synthetic gear oil in my VW tranny for about 75K miles. I recently changed it because it was getting very difficult to shift gears. I put in the same oil and it shifts pretty good now, although it could be better. I addressed this issue with some people and found out that this oil is infact corrosive to my transmission's internals. Since I have been using it for so long is my transmission likely to break soon? I'm going to put Royal Purple Max Gear in there as soon as I can, does that sound good? Thanks for any feedback. Skoda Octavia 1.8T 2000, 135K KM.