By Maryelle Demongeot

Russia and Ukraine are both ready to fully resume transit of Russian gas to Europe, Interfax quoted Russia Gazprom's CEOAlexei Miller as telling President Dmitry Medvedev on Tuesday.

Economic gloom deepened after the Royal Bank of Scotland posted the biggest loss in the UK's corporate history, with stock markets in Asia following European counterparts lower and Japan's Nikkei index closing down 2.31 percent.

The dollar rose to a six-week high against the euro on the news, making U.S.-denominated commodities less attractive to investors.

The United States was closed on Monday for the Martin Luther King holiday, and trade was thin, especially on the front-month February contract, due to expire on Tuesday.

U.S. light crude for February delivery fell to $33.35 a barrel by 0815 GMT (3:15 a.m. EST), down $3.16 from Friday's settlement after having slid as low as $33.30. There was no official settlement on Monday due to the holiday.

The March contract, which takes over as front-month on Wednesday, was down $2.97 to $39.60, and more than $6.00 a barrel above the February contract due to brimming crude stocks at Cushing, Oklahoma, the delivery point for NYMEX contracts.

London Brent crude fell $1.08 to $43.42 a barrel, having closed $2.07 lower on Monday.

"Seasonal cold weather continues to be the only supportive factor on the demand side," said French bank Societe Generale in an overnight report.

Oil prices have fallen by more than three quarters since record highs above $147 a barrel hit last July, as a financial turmoil has evolved into a global economic crisis and weakened oil demand.

Two recent supportive factors have been removed, after Russia and Ukraine signed a 10-year gas deal clearing the way for the resumption of supplies to a freezing Europe, and implementation of a ceasefire between Israel and Hamas in Gaza eased supply worries.

Further adding to the economic gloom, Saudi Basic Industries Corp <2010.SE> (SABIC), one of the world's largest chemical firms, posted a worse-than-expected fall in fourth-quarter net profit as a result of the global economic slowdown and pledged to cut costs at affiliates abroad.

China, once a driver of the surge in oil prices, is expected to release this week fourth-quarter GDP data that economists say will show a 7.0 percent growth, much higher than in the developed world, but the slowest pace of expansion for world's third-biggest economy in nearly a decade.

(Editing by Ramthan Hussain)