One oil run with my newly tamed 198 dunky allowed me to make enough gasoline to last me my entire single player play-through. I probably have about 8,000-10,000 total now. A must-have for all your gasoline needs.
Probably the most underrated Dino in the game! They can actually harvest a massive amount of metal, crystal, stone, flint, and obsidian. In Ragnorok there is a ravine by the volcano in the highlands underwater, One run in this ravine will give u 10,000 metal ingots and well over 10,000 obsidian from the same dark gray rock.