The dollar index, a prorated measure of the dollar against six major currencies, rose 2 percent last week, putting pressure on commodities priced in dollars.
The index dropped less than 0.2 percent Monday.
On the supportive side, the purchasing managers index for China's service sector was posted as 56.3 in October, up from September's 55.4 -- figures above 50 indicating growth.
On the New York Mercantile Exchange, reformulated blendstock gasoline gave up 2.08 cents reach $2.5246 a gallon. Home heating oil lost 1.17 cents to $2.8705 per gallon.
Natural gas lost 8 cents to reach $3.44 per million British thermal units.
At the pump, the national average price of unleaded gasoline dropped to $3.252 per gallon, down from Sunday's $3.258, the AAA Daily Fuel Gauge Report said.
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