Brent crude futures slipped 35 cents, or 0.4%, to $88.87 a barrel, while U.S. West Texas Intermediate crude for September delivery was little changed at $82.47 a barrel. Both benchmarks remained below the more than one-month highs touched in the previous session.

Brent crude futures rose $2.69, or 3.05%, to $90.79 a barrel, their highest level since June 11. The benchmark extended last week's rally, when it gained 15.9%, marking its…

September Brent oil futures were at $90.27, up by 2.46%, and September crude oil futures on WTI (West Texas Intermediate) were at $83.64, up by 2.27%