Through May 31, 2011, save via mail-in rebate when you purchase Mobil 1 products. Save $12 when you purchase 5 one-quart bottles or a multi-quart container of any Mobil 1 family product. Save $15 when you purchase 5 one-quart bottles or a multi-quart container of any Mobil 1 family product and 1 Mobil 1 Extended Performance Oil Filter.Expires Mar 21, 2011

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