Picked up the X5 4.4 early this late March and this car is abou 1/2 year old. Changed the oil at 3200K miles with Redline 5W30. Just wanted to get the contaminents out. I'm planning to do another change in November - most likely the weekend I put the snow shoes on. Anyhow, what do you guys think....Redline 5W30, GC or Amsoil 5W30. I'm planning to keep this car so good engine matinence is a priority. I guess the oil change after winter should be a good time to start the UOA to see how it's doing.