At about 0940 IST, US benchmark West Texas Intermediate for October delivery, a new contract, rose 15 cents, or 0.36 per cent, to USD 41.75, and Brent was up 15 cents, or 0.34 per cent, at USD 43.68.
Prices hit three-month lows last week after US data showed an unexpected increase in commercial stockpiles of oil and gasoline, adding to worries about a global crude supply glut.
However, the weak reading narrowed the chances of a US interest rate hike this year, sending the dollar tumbling, making oil cheaper for anyone using other currencies.
But analysts said the uptick was unlikely to be sustained.
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"There is a clear downward momentum to the market at the moment," Michael McCarthy, a chief strategist at CMC Markets in Sydney told Bloomberg News.
"There are concerns about the oversupply situation continuing. Clearly USD 40 a barrel is a key point for West Texas and I'd expect to see support there given the bounces we've seen previously at that level."
Energy information provider S&P Global Platts said production from the Organization of the Petroleum Exporting Countries surged 300,000 barrels per day in June, close to an eight-year high of 32.73 million barrels per day.