Oil rose further above $68 a barrel on Tuesday, touching its highest since May 2015, supported by OPEC-led production cuts and expectations U.S. crude inventories fell for the eighth week. The Organization of the Petroleum Exporting Countries and allies including Russia are keeping supply limits in place in 2018, a second year of restraint, to reduce a price-denting glut of oil held in inventories. Brent crude, the international benchmark, was up 4 cents at $67.82 a barrel at 0949 GMT and earlier touched $68.29, its highest since May 2015. U.S. crude rose 15 cents to $61.88 and also reached its highest since May 2015. “Oil prices remain on an upward trajectory,” said Carsten Fritsch, an analyst at Commerzbank. “In view of sharply falling U.S. crude oil stocks and record-high compliance with the production cuts by OPEC, market participants are convinced that the market is continuing to tighten.” […]