As is happening across the General Motor’s lineup, the Buick LaCrosse is getting a powertrain update. The previous 3.6-liter V6 is being replaced with a new LFX mill which will be available at no-additional-cost on select trim levels instead of the standard 2.4L four-cylinder engine with eAssist. The new engine features variable valve timing and will crank out 303-hp on the front-wheel drive LaCrosse (an all-wheel drive version will also be available). This is up 23-hp. Torque also goes up, by 5 lb-ft to 264 lb-ft without affecting fuel efficiency, allowing the LaCrosse to retain a 17 mpg city and 27 mpg highway rating.
“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.”
This new V6 will use several light weight components to help maintain optimal fuel efficiency while boosting horsepower. The new fuel pump and isolated fuel rail will make the car quieter during operation and the direct injection will also allow for a reduction of emissions. Buick has made the engine greener particularly with cold starts, where hydrocarbon emissions have have been reduced by twenty-five percent because of upgraded fuel equipment.