Shell Oil. Co. is providing Ski Free discounts at participating stations in seven states. Ski Free is an ongoing promotional partnership with ski resorts that provides customers with a free lift ticket when they purchase 10 gallons or more of Shell fuel at participating stations. According to Shell, more than 40 ski resorts located in California, Colorado, Michigan and Oregon have partnered with Shell stations located throughout these states. Participating stations are also located in Nevada, Washington and Wisconsin.