 Traders aren't about to go all in yet because the latest economic numbers from China are mediocre at best, and China is the world's largest oil importer. Also on Wednesday, OPEC left its forecast for growth in global oil demand unchanged. The NYMEX August crude contract rose 0.9 percent on Wednesday to $82.10 a barrel. The global benchmark crude, Brent, rose 0.5 percent to $85.08 a barrel.