In a 2020 M340i xDrive
In Eco-mode: What's that?
In Comfort: Averaging ~24mpg (9.8l/100km)
In Sport+: hahaha... depends on how you're driving, closer to 18 mpg (13 l/100km) realistically, with a blend of city/highway...
...That sound though... - you're not actually worried about mpg when rolling in Sport+, are you? The gears hang high in the RPM band, maximum availability of power, fuel pump ready-to-gush - whatever fuel is burned in Sport+ is worth it.
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