Conoco Gas Card Trademarks that appear on this site are owned by Conoco Gas Card and not by CardCash. Conoco Gas Card is not a participating partner or sponsor in this offer and CardCash does not issue gift cards on behalf of Conoco Gas Card. CardCash enables consumers to buy, sell, and trade their unwanted Conoco Gas Card gift cards at a discount. CardCash verifies the gift cards it sells. All pre-owned gift cards sold on CardCash are backed by CardCash's 45 day buyer protection guarantee. Gift card terms and conditions are subject to change by Conoco Gas Card, please check Conoco Gas Card website for more details.