Oil held steady above US$133 a barrel Tuesday in Asia on worries about global petroleum supplies and the outlook for the U.S. dollar, the Associated Press reported. Midafternoon in Singapore, light, sweet crude for July delivery was up 95 cents from Friday at US$133.14 a barrel in electronic trade on the New York Mercantile Exchange. Nymex floor trading was closed Monday for Memorial Day in the U.S., and electronic trading levels were little changed from the day before during Asian hours. Monday was also a bank holiday in Britain, and trading volumes were lower than usual. In London, July Brent crude futures were up 36 cents at US$132.73 a barrel on the ICE Futures exchange. In other Nymex trading, heating oil futures rose 8.85 cents to US$3.9541 a gallon (3.8 liters) while gasoline prices rose 3.56 cents to US$3.4316 a gallon. Natural gas futures rose 20.2 cents to US$12.059 per 1,000 cubic feet.