Hello everyone, new guy here! I just found this board a short time ago and think its the best place on the internet for honest oil info. Here is my question, I have a 2001 Audi TT 1.8 Turbo. What oil would you guys use? Manual calls for 5w-30 dino at 10,000 mile OCI but I change the oil every 5k. I just put in Mobil 1 0W-40 at 30K miles. This car gets driven mostly highway but high speed 80-90 MPH for 100 miles per day. Is this oil ok or will the turbo chew it up? Mobil 1 0W-40 is what the garage who changes my oil recomended. Thanks!