Working to serve homes, businesses, and farms, we offer innovative products that provide effective solutions that are specific to the application; and because were member-owned, the cooperative approach is the only one that we know when it comes to serving our customers. Whether its oil or propane, diesel or biodiesel, water heaters or air heating and cooling equipment systems, our customers can count on us to carry cutting-edge energy solutions. Brands You Trust - People Who Know...Rockingham Petroleum.