UPDATE 6-Oil see-saws after big jump in U.S. gasoline stockpiles
* U.S. gasoline stocks rise 3 million barrels last week-EIA
* U.S. crude inventories fall 6.9 mln barrels-EIA
* U.S. Fed expects to scale back stimulus later this year
* World powers hope to resume Iran talks quickly
(Adds details, updates prices)
LONDON, July 17 (Reuters) - Oil fluctuated on Wednesday after stocks of gasoline in top consumer the United States piled up at the peak of driving season, while crude oil inventories shrank for a third straight week.
Inventories of gasoline rose by 3 million barrels last week, according to the U.S. Energy Information Administration, while crude oil declined by 6.9 million barrels.
U.S. crude inventories plunged 20 million barrels over the previous two weeks, the deepest two-week draw on record.
Brent crude edged up 3 cents to $108.17 a barrel by 1448 GMT. U.S. oil slipped 11 cents to $105.89.
Oil had held steady after the U.S. Federal Reserve Chairman said plans to roll back the central bank's economic stimulus later this year were not set in stone.
"Our asset purchases depend on economic and financial developments, but they are by no means on a pre-set course," U.S. Fed chief Ben Bernanke said in prepared remarks.
His comments, though broadly in line with analysts' expectations, were enough to generate a small market reaction - nudging the dollar lower and lifting oil off earlier lows.
"For now, the reaction in the oil market is pretty muted," said Oliver Jakob of Petromatrix in Zug.
"There's no big change in Bernanke's prepared comments. It's still all about a potential reducing of bond buying by the end of the year."
Investors are now awaiting his statement to Congress at 1400 GMT, which will be followed by a question and answer session.
Worries of supply disruption from the Middle East eased somewhat on hopes the West would soon resume talks with Iran over its disputed nuclear programme.
But investors remain concerned about interruptions to supplies from other major exporters such as Libya. Armed protesters stormed the eastern Libyan oil port of Zueitina demanding export operations be halted, a witness said.
(Additional reporting by Manash Goswami in Singapore; editing by James Jukwey)