10/2017 S4 one rocker went bad at about 55k miles, all of them changed, as were the pcv, water pump and thermostat and a pipe at the front of the engine a bit before the rocker, everything is standard, runs and drives beautifully - hopefully it will continue to do so for many more years. Since I got it, two + years ago it get Mobil 1 5w40. Driven easy when the oil is ‘cold’.
HTH.