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Originally Posted by what_a_bimmer
It's probably the manufacturers covering their backs to reduce the number of engine replacements. Anything above a litre or so between service intervals of say 10k miles and something isn't right.
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True that many engines won't burn much oil between oil service intervals.
How about this comment from BMW, on oil consumption.
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Because of their increased power output and torque, M engines have a maximum permissible oil consumption of 1.5 l/1000 km.
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