Between Castrol Edge, Valvoline Advanced, or Liqui Moly Special Tec AA what would you choose, and if you have time, why? They all have the 0w-16 weight offered. Of the three, Castrol has a little higher weight at100 degrees C. Of the three, Valvoline has a little higher HTHS number. Liqui Moly sounds cool, I have a German wife and a German dog, I like them both, so maybe I will like a German engine oil. They are all three using Group 3 base stocks, I think. Right now, I am leaning towards the Castrol.