TOKYO—Oil prices dropped on Monday as China’s release of gasoline and diesel reserves eased concerns over tight global supply, while investors cashed in ahead of a Nov. 4 meeting of major crude producers that could increase future production targets. Brent crude futures dropped 46 cents, or 0.6 percent, to $83.26 a barrel by 0746 GMT, after gaining 6 cents on Friday. U.S. West Texas Intermediate (WTI) crude futures slid 64 cents, or 0.8 percent, to $82.93, having risen 76 cents on Friday. The drops came after China said in a rare official statement that it had released reserves of the two fuels to increase market supply and support price stability in some regions. All eyes are on the Nov. 4 meeting of the Organization of the Petroleum Exporting Countries (OPEC), Russia and their allies, together called OPEC+, with analysts expecting them to stick to a plan to add 400,000 barrels …