Oil prices slipped further from record peaks Wednesday on profit-taking after fresh data triggered concerns that the US economy will slow down markedly, dampening oil demand, dealers said.In early Asian trade, New York's main oil futures contract, light sweet crude for July delivery, shed five cents to 128.80 dollars per barrel.The benchmark contract had closed at 128.85 dollars on Tuesday, down 3.34 dollars from its closing price on Friday, the last trading day before the US Memorial Day holiday on Monday.London's Brent North Sea crude for July slipped 12 cents to 128.19 dollars a barrel, after settling 4.06 dollars lower at 128.31 dollars on Tuesday.The price falls came after Brent had struck an all-time high of 135.14 dollars and New York crude reached a record 135.09 dollars on Thursday amid concerns about tight supplies and strong demand.