Posted on April 20, 2013 by admin could you tell me about how long a 20lb propane tank lasts? I am considering purchasing one of your propane stoves, could you tell me about how long a 20lb propane tank lasts? If we only cook a couple dishes a day, it lasts more than 3 months. Post navigationPrevious post: I was wondering do you carry stoves with four ring burners versus two ring burners?Next post: My understanding is that cast iron reacts to food and rusting could be a problem. What is your recommendations?