2024 Bmw M3 Competition Mpg Size. The m3 runs to 19 mpg combined (16 city, 23 highway) or 18 combined mpg (16 city, 22 highway) if itโs an m3 competition xdrive model. The bmw m3 competition weighs a stated 1805 kg at the kerb.
Fuel economy of the 2024 bmw m3 competition sedan. 2024 bmw m3 cs tested: