President Vladimir Putin met Deputy Crown Prince Mohammed bin Salman on the sidelines of the G20 in China yesterday and said they would work to address a global glut and overproduction that has hammered prices for the past two years.
However, they provided no information on how they would proceed, just weeks before Moscow and crude cartel OPEC meet in Algeria to discuss the crisis.
At about 0320 GMT, the US benchmark West Texas Intermediate was down 0.74 per cent, or 33 cents, at USD 44.11 while Brent fell 0.81 per cent, or 38 cents, to USD 46.45.
The losses pared Friday's three percent gains, which came after Putin said Russia and other producing nations should freeze output to stabilise fluctuating prices. Russia and OPEC together produce half of the world's oil.
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The previous attempt at reaching a deal in April were scuppered by OPEC member Iran's refusal to agree to any output freeze, and there are worries about the chances of an agreement can be reached in Algeria.
"We will get a lot of statements about it but probably nothing really concrete until we get to the stage of the Algiers meeting."
The oil market has been plagued by a stubborn supply glut that saw prices plunge to near 13-year lows below $30 at the start of 2016, and while it has recovered recently, it is still well off highs above $100 seen in mid-2014.