So my 2012 Audi S4 oil temps run at 230-235F at highway speeds. My assumption is that the water temp, which I can't monitor, is darn close to that. It's a 3.0L Supercharged 90 Deg. V-6. Obviously, not moving nearly the same weight but I've done oil sampling over the years and they've been perfect. I believe that modern synthetics can run safely all day at 250-260F. So 235F, no concern at all. I would say that the TFL towing test was brutal and 235F is perfectly fine and not too far above the 3.0L's normal engine oil temp of 205-215.
The 2.7T runs 250F under hard street/track use. My 03 A6 has 106K on it running K04's on a mild tune since about 30K with no other (engine) issues.