Audi 1.8 T, Blackstone report, engine has never used oil, no make up added, oil changed every 5 K,(changed at 2.5K during breakin) used Mobil 1 5W30 until 10K, then 10W40 until present. This sample was in hot weather 100 to 105, 20 to 30 mile trips, one long 2600 mile trip, lots or redline (its...