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Old 08-18-2015, 07:16 PM
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X5only X5only is offline
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Join Date: Feb 2008
Location: Bellevue, WA
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Been using BMW high perf oil 5w30 (6k oil change intervals) since the new car warranty fell off way back in 2008. Until recently she's been consuming too much oil and heavy smoking after extended idle. Then I recently switched to Mobil1 10w40 high mileage full synthetic oil and, voilą, significant reduction in oil consumption and no smoke! I'm not going to spend the car's value to properly fix the smoke issue (valve stem seals and valve guides), no way as long as she runs and performs fine!
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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M.

Last edited by X5only; 08-18-2015 at 07:26 PM.
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