Capitol City Oil has proudly served the Greater Harrisburg Area for over 20 years. We are your source for a reliable PA heating oil company.? Our customers trust us because of our prompt service in dlivering the highest quality oil. Our other services include furnace cleanings and air conditioning sales and service. Contact us if you are looking for oil companies in the Harrisburg, PA area even if you are a small local business as we have accounts available for those too.