Harvest oil rocks along snowy northern beaches, icy islands, volcano regions, or underwater using a metal pick, mining drill, or an Ankylosaurus transported by a flying mount; bring suitable cold protection and prepare for hostile creatures. Dung beetles convert feces into oil and fertilizer over time, making them a safe renewable option near base. Basilosauruses, Gachas, and Tek creatures can also provide oil, while breeding or harvesting them offers an alternative to mining.