rtokens: September heating oil stood 1.02 cents lower at 62.65 cents a gallon .
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tokens: " There was some profit-taking early on , and it 's just sitting there , " a Texas trader said of heating oil 's and gasoline 's losses .
ltokens: NYMEX refined product prices lingered at session lows amid slim volume before the close while crude experienced lackluster buying ahead of the U.S. Labor Day weekend , traders said .