The dollar also weakened before government reports forecast to show U.S. durable-goods orders and new-home sales dropped in June and after crude oil rose for a second day.
The euro increased 0.4 percent to $1.5735 at 8:02 a.m. in New York, from $1.5677 yesterday. It also advanced 0.4 percent to 169 yen, from 168.28, after rising to a record high of 169.96 on July 23. The dollar was little changed at 107.40 yen, compared with 107.33.
The 15-nation euro was headed for a 0.7 percent decline against the dollar this week, its second consecutive decrease. The currency dropped 0.3 percent versus the yen. The dollar advanced 0.4 percent against the yen.
The euro was supported as Liebscher said ECB policy makers still have scope to raise borrowing costs. The Frankfurt-based central bank raised its main refinancing rate to 4.25 percent on July 3, citing the need to control inflation.
Crude oil for September delivery rose for a second day, increasing as much as $1.02 a barrel, to $126.33 a barrel, on concern supply in Iran and Nigeria may be disrupted. The euro- dollar exchange rate and oil have moved in the same direction 90 percent of the time during the past year, according to Bloomberg calculations based on the correlation of their value changes.
The dollar was still headed for a weekly advance against the euro after Federal Reserve Bank of Philadelphia President Charles Plosser said on July 23 that interest rates should rise ``sooner rather than later'' to quell inflation.