Where do you find petroleum.

[DanielSon]

Where in the wild atleast. I found a vendor but she dissapeared. I looked online and apparently there's a weird bulb creature that has it in a specific location but i just counldnt find it.

[Beewo]

Do you remember that giant tree/mushroom thing you had to go to in one of the quests, where you found a backpack of some lost survivor? A bit north of there, not far at all, there is some. Just use your scanner and you should find it pretty quickly.