The Cruze's styling does have a downside on the fuel economy front over the Astra, but despite this, the Chev sipped only 7l / 100 km, and still offered grunt when needed. (torquingcars.com)
On the fuel economy front, Mercedes - AMG has equipped the V8 engine in the G 63 with the AMG Cylinder Management cylinder deactivation system. (kbb.com)