My sister bought a 2007 Audi A4 2.0T FSI from an Audi dealer with 30k miles and now it has 37k. She planned on changing the oil at the dealer at 40k per the factory recommendation, but I volunteered to change it at 5k intervals due to what I have read on this forum regarding FSIs.I have done some research and I see that most of what we know about this oil comes from the thread about 23 used oil analysis, but there are some good oils that are not represented. She is not going to pay $50+ for RLI, Motul, or Redline. We need an oil in the under $30 range, preferably available over the counter in case we run out of makeup oil. I ran across a good UOA for Rotella T6 and I was wondering if anybody knew of other used oil analysis for this oil on the FSI.
https://bobistheoilguy.com/forums/threads/rotella-t6-5w-40-in-audi-2-0t-fsi-8300-miles.134847/
https://bobistheoilguy.com/forums/threads/rotella-t6-5w-40-in-audi-2-0t-fsi-8300-miles.134847/