Where can I find Tanks in Schwarzhäusern?

Tanks can also be found in these cities:

Aarburg Auswil Bellach Breitenbach Brislach Brittnau Bätterkinden Deitingen Derendingen Dulliken Däniken Egerkingen Feldkirch Hergiswil bei Willisau Herzogenbuchsee Hägendorf Hölstein Kappel Langendorf Langenthal Laupersdorf Lostorf Nebikon Neuendorf Niederbipp Oberbipp Obergerlafingen Oensingen Oftringen Olten Pfaffnau Rothrist Safenwil Schötz Solothurn Wiedlisbach Wikon Willisau Zell Zuchwil

You can also find this in Schwarzhäusern:

Midgrade Gasoline Super Premium Gasoline Regular Diesel Air Conditioners Tires Computer New Car Commercial Vehicles Natural Gas