It's very interesting to read your blog, lots of things to learn. 
After reading your article regarding the gear box oil of BMW, I 
am wondering should I follow the BMW advise to change the  
enginee oil every 20,000 Km (or once a year) or I should change more 
often. 
I am using a 2008 X5 3.0si, got it at 2007 Dec with 20K KM so far, 
but still did not change the oil yet..  Because everytime I went to  
their service centre, they said 'not necessary".  Could you advise 
your professional idea? 
Sorry to mention that I am living at Edmonton, Alberta. 
Thanks so much!! |