Buick LaCrosse eAssist
Fuel economy: 25 City / 36 Hwy
The LaCrosse's eAssist system provides a slight battery-powered assist that improves fuel economy and does so unobtrusively. The LaCrosse still drives smoothly and quietly as a Buick should.The only downside is that the battery pack takes away a bit of trunk space. There's still plenty left, as long as you're not packing for a non-stop cross-country trip.