Please dont listen to that junk,

The rules of car maintenance have been pretty set in from that past, and its been tried and tested what works well.

Prime example- 15k oil change intervals? Anything over 6-7k max with full syn is due. Its been said thats one of the reasons the 4.8 engine developes smoke issue.


I wouldnt let a 1990 honda civic go past 5-6k on synthetic oil cause you have to remember ours have a large capacity 8+ qt vs other cars 4-5, let alone running a 75k bimmer on old oil, if you can afford it you can afford to change oil quicker too.

Same goes for trans fluid, fill your bathtub with water and soap, bathe in it for 2 months, kind of the same concept with transmission fluid in a way, dont believe the lifetime fluid stuff.

Sorry for the rant but it tweaks me a little cause those kind of phrases and intervals makes cars alot more worn if you buy used in future cause of mal maintainence.

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2006 X5 4.8is Fully Loaded