About Us

In 1946, Lee D. McMahan started the McMahan Poultry Company. In the early 1950s, he acquired a used oil truck to deliver fuel to his own poultry houses. Soon thereafter, he started delivering fuel to neighboring poultry farmers who wanted the benefit of oil delivery. Tri Gas & Oil was officially incorporated in 1963, delivering heating oil around the Eastern Shore.

At the time of incorporation, Tri Gas & Oil primarily offered propane gas and heating oil delivery to commercial customers. As our business grew, we expanded our offerings to include residential customers, and also added to our product lines. We began offering custom oil blends, biodiesel, and a range of other cutting edge and environmentally friendly products—perfect for the Delmarva agriculture industry, as well as homes and businesses.

We are still 100% committed to providing excellent service to Delmarva, over 55 years later.

For more than three generations, customers have relied on Tri Gas & Oil as a locally owned, family-run business. We specialize in making area homes and businesses more comfortable, and in helping our customers lower their energy costs.

Today, Tri Gas & Oil offers a full range of energy solutions to both residential and commercial customers in Maryland, Delaware, and throughout the Delmarva Peninsula. Still family-owned, and committed to customer satisfaction, Tri Gas & Oil is your complete home and business comfort provider in Maryland and Delaware.


  • TriGas & Oil Co, Fuel Oil, Federalsburg, MD