[trek8000]

I was reading my X1 35i owners manual only to find that the guage in question is for Oil Temp and not Coolant Temp. This is my first BMW and first turbo. The guage appears to have soemething to do with the fact that this model has a turbo and it is there to help the driver. The owners manual makes no mention as to how the guage will help in terms of proper turbo care. Can anyone provide some guidance on the proper operation care of the turbo ie; doe's and dont's and how this guage will help? I have read that there are general rules on long life tubo care. Thank you in advance to the experts!