How do I combine Fossil and Pressure in Doodle God?

In Doodle God, combining Fossil and Pressure will create Oil. This combination is part of the game's progression and helps unlock new elements in the Energy category. To achieve this, you first need to ensure you have both Fossil and Pressure unlocked. Fossil is typically created by combining Bone and Earth, while Pressure is made by combining Air and Air. Once you have both elements, simply drag Fossil and Pressure together in the crafting area to create Oil. This combination is logical, as pressure applied to fossilized remains is a real-world process that produces oil. After creating Oil, you can use it to further progress in the game by combining it with other elements to unlock new items and categories. Experimenting with Oil in different combinations will help you advance and discover more complex elements.