DETROIT, Jan. 11, 2013 (GLOBE NEWSWIRE) — Despite continued hype and heavy investment by auto makers in electric propulsion technologies, global automotive executives say that optimizing the internal combustion engine will see the most investment over the next five years. Executives also indicated that they don’t expect e-car sales to exceed 15 percent of annual global auto sales before 2025, according to the 14th Annual Global Automotive Executive Surveyconducted by KPMG LLP, the U.S. audit, tax, and advisory firm.