Home Heating Oil Suppliers. Sweeney Oil provide quality, low cost home heating oil, delivered on time with a friendly smile. We have with offices in Clifden, Galway City, Oranmore & Ballinrobe and have been providing a local home heating & commercial oil delivery service to its loyal customer base, covering Connemara, Galway, Ballinrobe and surrounding areas since 1987. You know us... were local!