I am considering purchasing a BMW M9 and I am wondering which engine option would be the most fuel-efficient. Any recommendations or personal experiences?
ReplyThe best engine option for fuel efficiency would be the 3.0L inline-six-cylinder engine with electric motor, offering an impressive 72 MPGe.
I have found that the diesel engine option is also a great choice for fuel efficiency, with an estimated 50 MPG on the highway.
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