Cheshire Oil is confident that the smile it has put on customers' faces in Southern New Hampshire and Vermont won't suddenly disappear. The company's services (under the Cheshire Oil and T-Bird Fuel brands) to residential and commercial clients include heating oil delivery, oil and propane furnace and boiler installation, service, and repair, fleet fueling, and central air-conditioning installation and repair. Cheshire Oil also operates gas stations and convenience stores under the T-Bird Mini-Marts moniker. It also offers storage rental services through Keene Mini Storage. Cheshire Oil is owned and managed by members of the founding Robertson family.