INFINITI today reported sales of 12,820 vehicles in the U.S. during February, down 7%. The Q50 sports sedan had its best-ever February, up 13.4% to 3,904, while the Q70 luxury performance sedan increased 9% for the month. The updated 2018 QX80, INFINITI’s premium full-size SUV, had its best February, with an increase of 4% to 1,689.