Oil prices fell on Tuesday, weighed down by sanction exemptions from Washington that will allow Iran’s biggest oil customers to keep importing from Tehran, as well as by concerns that an economic slowdown may curb fuel demand growth.  U.S. West Texas Intermediate (WTI) crude futures CLc1 were at $62.86 a barrel at 0800 GMT, down 24 cents, or 0.4 percent, from their last settlement. International Brent crude oil futures LCOc1 were down 48 cents, or 0.7 percent, at $72.69 a barrel. Analysts said expectations of an economic slowdown in coming months were weighing on the fuel demand outlook, while concerns eased on the supply-side after Washington granted sanction waivers to eight importers of Iranian oil that will allow them to continue purchases. Washington gave 180-day exemptions […]