In 1981, Tevis Oil diversified and took the leap into the convenience store industry. The first store, originally called Tevco, was primarily a self-service truck stop featuring less expensive, unbranded gasoline, along with hot food, drinks, and several convenience items. Its location on Baltimore Boulevard in Finksburg was the perfect spot for the business to flourish. After the success of the first store, Tevis Oil continued to open new stores over the years with each one offering a little more than the last. Currently there are five stores in the chain, and another is scheduled to open next year. All of the stores are now called Jiffy Mart, with three of them featuring Shell gasoline and two featuring Tevco gasoline. Four of the five have Subway Restaurants and one has a self-service car wash. Jiffy Mart is exclusive to Carroll County and plans to remain so. The friendly, family-oriented feeling customers experience in every Jiffy Mart is what sets the stores apart from the large, corporate convenience store chains. Jiffy Mart has come to be known as Carroll County's "Hometown Convenience Store."

Although all five Jiffy Marts already offer their signature fresh roasted coffee and several deli items, the selection of choices will be expanded with the opening of Joe's Café in May of 2005. Most of the Café's signature items will be available in all Jiffy Marts, but the original Finksburg Jiffy Mart will be the only location to offer Joe's complete line of hot and cold deli creations.

Along with the new Café selections, Jiffy Mart has modernized its image by installing custom refrigerated open-air cases in all of its stores. This facilitates our customers' need for convenient grab-and-go food that is made fresh and delicious, as well as grabbing those less than healthy pre-packaged snacks that everyone occasionally craves. Quality, convenience and a friendly atmosphere is Jiffy Mart's goal. Each store's highly trained staff will ensure that every customer leaves their local Jiffy Mart with a smile on their face.