I utilized Mobil 1 at my last oil change. There were some interesting concerns expressed here though by a senior poster relative to this brand accumulating fuel deposits, as a consequence of how rich the A/F ratios are in Lexus vehicles. It is possible that I will consider a switch to Pennzoil or Amsoil at my next change but I am not certain. There is a whole sticky post related to a discussion on this topic that contains a number of opinions.