So, say you don’t want the 37 mpg eAssist system offered standard in the 2012 Buick LaCrosse. That’s okay, because Buick has officially announced that it will offer a 302 hp 3.6L LFX V6 engine in the 2012 LaCrosse as a no-cost option. The same engine will be offered standard in the 2012 Chevrolet Impala, as reported earlier. The V6 option is expected to return 17 mpg in the city and 27 mpg on the highway for the LaCrosse, which is expected to be available later this summer. For more, open up the presser.