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In Reply to: m6 vs. 850i in terms of maint. costs? posted by jm on November 16, 1999 at 22:57:31:
I'm not sure exactly, but 850s have a lot of electrical and computer components that in the long run will cost a lot more to replace than the simplicities in the 635/m6, but as far as engines, i am not sure. the 8 probably doesn't need oil/service as often as the 6.