Oil prices ended a shade firmer after retreating from multi-year highs hit early in the day on Tuesday, supported by concerns that U.S. sanctions on Iran are likely to restrict crude exports from one of the biggest producers in the Middle East. A burn-off flare is seen at the Ceylon Petroleum Corporation’s (CPS) Sapugaskanda Oil Refinery in Colombo, Sri Lanka May 11, 2018. REUTERS/ Dinuka Liyanawatte Brent crude oil LCOc1 settled at $78.43 a barrel, up 20 cents, or 0.3 percent, after reaching an intraday peak of $79.47 a barrel, up $1.24 and its highest since November 2014. U.S. light crude CLc1 closed 35 cents, or 0.5 percent, higher at $71.31 a barrel, also not far off the day’s peak at $71.92, its highest since November 2014. The difference between the two benchmarks briefly widened to more than $8 a barrel, the widest gap since […]