The oil workers strike widened over the weekend , with 1,400 workers at two BP refineries in Indiana and Ohio walking out: The first nationwide strike by oil refinery workers since 1980, the addition of BP's Whiting, Indiana, refinery and the company's joint-venture refinery with Husky Energy in Toledo, Ohio, brings the total number of plants with strikers to 11, including refineries accounting for about 13 percent of total U.S. oil refining capacity. The original strike included workers in California, Kentucky, Texas and Washington.