Quote:
Originally Posted by frodo1mjg
3 to 5k miles is the norm here in southern california is there any reason why it should be done less frequently?
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Most of us drive is "severe" conditions which includes city/highway driving and or living in areas with lots of dust and crude in the air. I ignore the service intervals for "light duty". I have been changing the oil and filter at 3750 -- 4000 miles and had no problems. Synthetic oil has made a big difference in engine wear and works better in general but it still gets contaminated with condensate, blow by and crud.
I also think owners neglect to service other filters like air filters and cabin filters on a routine basis. We have dust and grit from the deserts in Mexico and Africa in the atmosphere most of the year in the southwest US.
Take a look at the attached article on engine oil from the Seattle BMW Owners newsletter.
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