Oil dived more than $4 a barrel on Tuesday, its biggest drop in more than two years as mounting evidence of slackening demand and unrelenting U.S. shale output left traders struggling to peg a floor for crude’s four-month rout. The abrupt acceleration of an over 26 percent slide in prices since June was triggered by three news items that epitomized the market’s turn: a downgrade in global oil consumption forecasts; projections for another big boost in shale oil; and reluctance by OPEC members to cut output. Brent crude for November fell $3.85 to settle at $85.04 a barrel after a late lurch lower knocked prices to below $85 a barrel for the first time since 2010. It was the biggest one-day drop since 2011. U.S. crude fell $3.90 a barrel to settle at $81.84, its biggest percentage fall in about two years. Oil […]