I just found this board and I think it's great! Anyway, I have a 2002 Audi allroad with the 2.7t (twin turbo) engine. The factory specifies 0W30 or 5W30 oil with a 10K miles change interval. I changed to Mobil1 0W30 at 5K miles. I've read alot on this board about Mobil1 0W40 as being a great oil. How does it compare to Mobil1 0W30? I cannot find 0W40 available locally (Olympia, Washington) and can find 0W30 only at NAPA stores. Which oil do you suggest for my application? Thank-you.