I myself believe in shorter oil intervals on these engines. The average person has short commutes and my not run the engine a high RPMs which can account for sludge and not completely flushing the oiling journals. This is a common occurrence on newer BMW's My 540 had visible sludge on 15k intervals but my 545 has no visible sludge and I have been doing 7500 changes. I would be inclined to do 7500 intervals because of the Turbos. They do a very good job of heating the oil up. 250 degree oil is not to difficult with a little spirited driving and from my past motor experience, is not high oil temps are not good.
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2012 X5 50i ZAP(2VA, 336, 465), ZTP, ZPP, ZPS(6VC), ZCW, ZRC, 322, 4UB, 4NC, 610
2011 ///M3 Silverstone II
2011 X5 50i(lemon)
-- SOLD --
08 550 Msport
07 X5 4.8I sport
04 545i sport
02 4.4i sport
01 540I M/sport
00 SL500
97 SL500
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08-31-2010, 02:59 PM
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