GM has officially announced that the 2012 Buick LaCrosse is getting a new more powerful V6, in the form of a 303-hp 3.6L V6. The 3.6L V6 puts out 23 more horsepower than the last V6 without any penalties at the pump. The 3.6L V6 gets 17 mpp city and 27 mpg highway. 
“The changes we’ve made to the 3.6L V-6 represent greater refinements to an already well-balanced package,” said Tom Sutter, global V-6 chief engineer. “We are using the latest designs, lighter-weight components and enhancements to improve the engine’s performance, efficiency and durability.”
The 3.6L V6 is lighter and more powerful than the old V6 thanks to a new cylinder head design, which has a revised intake port design that enhances airflow to the combustion chambers. Larger-diameter intake valves in the heads and new, longer-duration intake camshafts help provide the engine’s boost in horsepower.
The V6 is available as a no cost alternative to the standard 2.4L four-cylinder engine with eAssist.
“Thanks to increased use of lightweight components and other enhancements, the new 3.6L V-6 offers 2012 LaCrosse buyers improved acceleration with no hit to fuel efficiency,” said Doug Osterhoff, LaCrosse product marketing manager. “This new engine is an attractive option on the car that’s been widely hailed as one of the most attractive luxury sedans on the road today.”
