Remember the energy-saving St1 Opti heating oil. ORDER CENTER ST ORDERING CENTER SALES: Heating oils - Motor fuel oils - Transport fuels. If you wish, you can also call our number 02083 55555 St1 also invests in environmentally friendly development in heating oils. All St1 heating oils contain 2% biocomponent as of January 1, 2009. The share of the biocomponent will gradually increase so that in 2016 it will already account for ten percent of the total amount of heating oil. St1 Visa The St1 benefit accumulates everywhere, order your own card here. ST - Order Center Orders: 02083 55555