That’s because today’s high-pressure direct injectors deliver fuel to the point of combustion in the cylinder so that it doesn’t get left behind on manifold walls or evaporate. Essentially, the majority of the gas you purchase goes toward powering your vehicle.
From an environmental standpoint, it’s important to recognize the benefits of a direct injection system since it has the ability to add a second injection pulse right before the spark plug (read: when you turn the keys in the ignition) ignites the fuel following a cold start. Your car releases more emissions into the air as it warms up on cold days, so the less time it takes to warm up, the less emissions.
Where are we going with this?
Buick will become the first domestic car brand run entirely by direct injection engines.
The system will enable efficient power output and better fuel economy. It helps the Enclave become the most fuel efficient eight-passenger crossover on the road with estimated 17 mpg city/24 highway.
Across Buick’s lineup, direct injection has improved fuel economy of up to 3 percent in the Enclave, LaCrosse, Regal and upcoming Verano.