* Dollar drops to two-month low against euro
* European bank watching interest rates closely
* U.S. crude oil inventories higher
(Updates throughout, adds quote)
By Jessica Donati
LONDON, Jan 21 (Reuters) - U.S. crude oil prices stalled, erasing early gains on Friday and widening the discount to Brent, which rose after the dollar dropped to a two month low against the euro on renewed confidence in European recovery.
The divergence between U.S. crude oil and Brent prices widened as a surprise increase in U.S. inventories on Thursday weighed on the U.S. market. [
]"There is much more transparency on liquidity and inventories and I think as a result that makes it a lot easier to plot... U.S. crude is coming down on the back of inventory data last night," said Michael Hewson, a market analyst at CMC markets.
U.S. dollar weakness helped spur buying across a range of commodities, with Brent <LCOc1> gaining 46 cents a barrel to $97.04 per barrel by 1436 GMT. But U.S. crude futures <CLc1> turned lower as the U.S. trading day began, trading 12 cents lower at $89.51 per barrel, down from as high as $97.41 per barrel earlier on Friday.
A weakened U.S. currency makes dollar-denominated commodities cheaper for holders of other currencies. The dollar index <.DXY>, which tracks the currency's performance against a basket of major currencies, and is heavily weighted against the euro, was down by around 0.5 percent.
"The oil market is looking back at what the dollar is doing and the dollar is coming under further pressure, and it has broken through significant support levels," said David Morrison, a strategist at GFT.
U.S. crude remains nearly 2 percent lower on the week however, while Brent futures, also around 1.5 percent lower, have held at an unusual premium to U.S. crude. Brent's spread against U.S. benchmark crude topped $7 a barrel on Friday, down from last week's surge above $8, which was the widest since February 2009.
"The spread is starting to get rather stretched and when it does get rather stretched there is usually a sharp correction at some point," Hewson added.
CONFIDENCE IMPROVING
Further U.S. dollar weakeness could continue to support oil prices. Successful bond sales [
] and improving business morale [ ] have boosted the euro, pressuring the European Central Bank (ECB) to step in to curb inflation, which could weaken the U.S. dollar further."China is raising rates, Brazil is raising rates, you have inflation pressures picking up in the euro zone, while there's certainly no chance of interest rates going up any time soon in the U.S.," added Morrison.
On Thursday, the European Central Bank (ECB) said it was monitoring prices levels closely although its medium term outlook was unchanged [
]."A combined move with the weaker dollar and improving business confidence in Germany is supporting oil. On Thursday we saw a very strong support point... We could see a test of the upper level, which is $99.20 for Brent," said Thorbjorn Bak Jensen," an analyst at A/S Global Risk Management Ltd.
Oil is nearly $50 below the record high of $147.27 hit in July 2008, but a rally that set in late last year, taking oil prices to nearly $100 a barrel has stoked concerns a fragile economic recovery could unravel.
Ministers of the Organization of the Petroleum Exporting Countries have said there is enough oil on the market and there is no need to produce more, although some analysts do not rule out an informal increase in output.
"There is a rising risk of coming into the office one Monday morning to find OPEC has raised output dramatically," JP Morgan analysts led by Lawrence Eagles said, adding, "we believe the time has come for investors to pare risk and take some profits."
(Editing by Keiron Henderson)