Oil rose Tuesday from a dive to a four-month low in the previous session as the euro gained against the dollar ahead of a confidence vote in Greece aimed at avoiding a messy default of its sovereign debt.
US crude for July delivery rose $1.10 to $94.36 a barrel by 1156 GMT. On Monday, it hit $91.14, its lowest level since late February. The contract expired late Monday night.
ICE Brent rose 81 cents to $112.50, having fallen in the previous four sessions.
"The market has been supported today by the euro," said Mark Thomas, broker Marex's head of energy Europe.
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Global investors kept a close eye on a parliamentary confidence vote for Greek Prime Minister George Papandreou, a step towards the passage of more spending cuts in exchange for foreign loans.