Henley Enterprises Inc., the largest Valvoline Instant Oil Change (VIOC) franchisee, is partnering with the U.S. Army to guarantee job interviews for current and former U.S. Army soliders, Army Reservists, and ROTC cadets interested in working for the company. Henley Enterprises employs 2,000 people at more than 200 service centers across the United States. Of those 2,000 employees, nearly 3% are veterans.