Koala,  IMHO China does not need U.S. oil.  By buying U.S. oil,they have to settle for U.S. treasuries, another form of sinking value.   Russia is already supplying most of China's needs & other countries can too -  Brazil, Iran to mention a few.   The Silk Road countries are united & 6T$ have been invested in their projects.    Even Egon von Greyerz to-day on King World News referred to the Trade Wars convenient excuse by the U.S. just before this Petro Yuan deal.    The U.S. Debt problems are impossible at this stage to resolve  & millions will suffer.    Time to take cover before the oncoming GREAT DECLINE -  the likes of which you & I have never seen.   People have been too brain-washed by the Mass Media false propanda.