LONDON—Oil futures rose on Friday on course for a fourth weekly gain boosted by supply constraints and a weaker dollar.
Brent crude futures rose $1.16, or 1.4 percent, to a two-and-a-half-month high of $85.63 a barrel at 1125 GMT. U.S. West Texas Intermediate crude gained $1.06, or 1.3 percent, to $83.18.
