whistling sound from back

[sanai79]

Hi. I have a 2004 BMW 330Ci /auto(i know.. =(..) with sports package/premium package/18 in wheel package. I had it just over 2 month now. I'm getting weird whistling sound from the back of my car when I'm driving at about 85-90 mph. I can consistantly reproduce it by accelerating to about 90 mph then letting the accelerator go a little and slow down to 85mph ish. It's a faint whistling sound from back of the car. I'm taking the car in on wednesday. However, when i called the dealer they said the problem is they won't be able to reproduce it because they can't drive it over 65mph. Any suggestion on what the problem is?

A quick questions. I have over 2000 miles on it now. When should i get an oil change. Dealer said 15,000 miles but I feel kinda uneasy waiting that long for it. Thanx.

[cksevencrown]

I hear the same noise comming from the car when i'm doing a good 90 mph. It's really annoying...

[mankiks323i]

1... when you have a new car there is a thing called break in period not to drive 100 mph on new parts of car. the whining possibly is the differential i think there are issues with bmw and whining differentials mine does at at lower speeds sometimes not all the time.... As for your oil changes bmw use synthetic oil i change mine 1 a year at first i was apprehensive but i check my oil frequently and the car has not burned or i having to add any within a year. If you absolutly can't go with that regimine try 2 a year once in spring then in fall. synthetic oil is very good oil and can go many miles before oil changes. If you change more often than that i think you would be wasting your money my two cents worth