It is supposed to be ATE...

...and I recall when Rolls Royce used mineral oil instead of brake fluid.

I remember reading a Road and Track article back in the 70's about a new Rolls Royce model, and it was of particular notice that they decided to use mineral oil instead of brake fluid. When they questioned the anomaly, the Rolls Royce spokesperson said they did that simply because it was "cheaper".

Gee...I guess that would be of great concern for the typical Rolls Royce owner!!!

But I digress...as far as vacuum hoses go, it's hard to tell visually sometimes, and I find it best to just replace them all based on the age of the car. A lot easier than just selectively replacing ones that appear to be suspect.

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car