Meanwhile, U.S. pump prices are the lowest they've been since February 2011.
Benchmark U.S. crude for December delivery rose 54 cents to US$95.14 a barrel on the New York Mercantile Exchange. Brent crude, the international benchmark, gained $1.28 to US$106.40 a barrel on the ICE exchange in London.
Six key powers are considering a gradual rollback of sanctions that have crippled Iran's economy. In exchange, they demand initial curbs on Iran's nuclear program.
The U.S.-led negotiations, however, failed to yield a deal over the weekend. This eased concerns of an influx of Iranian oil on world markets at a time of already abundant supplies.
In other energy futures trading on Nymex, wholesale gasoline added four cents to US$2.60 a U.S. gallon (3.79 litres), heating oil gained two cents to US$2.89 a gallon and natural gas advanced two cents to US$3.57 per 1,000 cubic feet.
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