Chevrolet lied. The GM company estimated back in February that the Cruze Diesel would be getting 42 mph. It doesn't; it gets more. The official EPA rating puts the Cruze Diesel at 46 mpg on the highway, which, according to Chevy equates to 700 miles per tank and about 10 hours of straight driving on the highway. That makes this the most fuel-efficient non-hybrid car in the U.S. At $2,115 more than the regular fuel Cruze model, that seems like a steal. 

Related: EPA Reports That 2012's 23.8 MPG Average Was the Best Ever

Related: This "Car" Gets 3,587 MPG

[via Chevy]