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.
Ok, I'll submit a tip but one thing. THE GUY WHO CORRECTED THAT OTHER GUY ABOUT "the fastest bite" IS A HUGE D---- YOU DIDN'T HAVE TO BE SO RUDE! YOU'RE THE IGNORANT ONE SO SHUT UP AND GO TO BED JOHNNY. anyways, these guys are really good at getting obsidian they're also GREAT DEFENSE IN THE WATER. I recommend getting one of you want a lot of obsidian.
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.