Where can I find Oil in Greppen?

Oil can also be found in these cities:

Altdorf Baar Buchrain Buochs Cham Ebikon Emmen Goldau Hitzkirch Horw Ibach SZ Ingenbohl Kriens Küssnacht Lucerne Malters Oberdorf Rain Rotkreuz ZG Sarnen Sempach Stans Steinhausen Unterägeri Urswil Wädenswil Zug

You can also find this in Greppen:

Fish Croissants Flour Wheat Breads Diet Products Ready Meals Energy Drinks Espresso Beans Food Flips