I mean for a "personal" amount of oil, I suppose a backhoe would do. But, to change the front month price, you have to actually store a significant fraction of world oil production (1-2%?). I don't think a backhoe is going to cut it. Then you have to somehow make sure it doesn't plume into the ground water, which is impossible absent very specific geological features or somehow lining the world's largest open pit mine with an impermeable barrier.
