Green cars will again be the highlight of the New York International Auto Show, which opens Friday following press previews on Wednesday and Thursday. … Highlights include further details on the Chevrolet Volt and Nissan Leaf electric cars , a 40 mpg Chevrolet Cruze Eco, and plenty of hybrids . The show is at New York’s Javits Center and runs through Sunday, April 11. It’s the last of the major U.S. auto shows, which began last fall in Los Angeles and worked their way …