Oil up slightly ahead of long US weekend as peace efforts hold

Pumpjacks are seen against the setting sun at the Daqing oil field in Heilongjiang province, China December 7, 2018. — ReutersBrent futures were up 17 cents, or 0.24%, to $72.10 a barrel.WTI was up 14 ​cents, or 0.20%, to $68.83 a barrel."It's a case of guarded optimism,”...