French sprinter Christine Arron and Russian triple jumper Tatyana Lebedeva remain the only athletes with a chance to win the Golden League jackpot. The $1m (�570,000) prize is shared by anyone winning their event at each of the six meetings - and the pair kept up their challenge in Oslo's third leg.
Lashinda Demus - the only other contender prior to Friday's meeting - was third in her 400m hurdles.
Briton Jo Pavey finished third in the 3,000m with a season's best time.
In the newly-constructed Bislett Stadium, Arron clocked 11.06 seconds to edge out Olympic silver medallist Lauryn Williams (11.16) and her US team-mate LaTasha Colander (11.17).
 |  I found it really tough as soon as the gun sounded |
Lebedeva jumped 14.89m to win her event from Jamaica's Trecia Smith (14.65m), while Yamile Aldama, of Sudan, was third with a jump of 14.27m.
In the women's 400m hurdles, Demus stumbled to hand victory to her countrywoman Sandra Glover in a season's best time of 53.93secs.
Poland's Anna Jesien was second in 54.43 with Demus crossing the line in 54.59.
"I stumbled, my legs gave out on me and I got over-excited," said Demus. "It's terrible what happened."
In the men's 100m, Ghana's Aziz Zakari, winner in Paris and runner-up three weeks ago in Rome, returned to top form.
He won in 10.02secs, beating Trinidad's Marc Burns and Tyson Gay from the USA, who came home in 10.07secs and 10.15secs respectively.
Bahrain's Maryam Jamal clocked a national record and world-leading time for 2005, winning the 3,000m in eight minutes 28.87 seconds, covering the last lap in under a minute.
Kenya's Isabella Ochichi was second in 8mins 31.42secs, while Pavey was next in 8:33.79.
"I found it really tough as soon as the gun sounded," said Pavey, who will compete in the 5,000m at the World Championships in Helsinki later this month.
"But I more or less expected it because I've just come out of a tough training block.
"But it's the World Championships that count and I have to take satisfaction in comparison to last year when I ran only 8:46 in a similar time frame before the Olympics.
"This was a lot quicker - I think a good solid run which I wanted and a good burn-out before Helsinki. It shows I'm pretty sharp before going there."
MMIX
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