This is a fully functioning oil to fuel refinery. it pumps oil from ground stores in holding tanks, pumps from holding tanks to refineries which are powered by combustion engines that are fueled and cooled as well. from the refineries the fuel is pumped to a massive multi-tank that holds 1024 buckets of fuel. all of this is wired up with switches for all pumps . the refineries being powered by combustion engines have buttons to turn them on and off due to the emergency shut off which can be manually triggered or when the massive fuel tank fills it shuts all refineries down. this took me about a week to build and design but it was fun as hell!!