Vienna - The price for crude oil produced by the Organization of the Petroleum Exporting Countries (OPEC) remained virtually unchanged, figures released by OPEC showed on Tuesday.

One barrel (159 litres) of OPEC-produced crude stood at 139.81 dollars Monday, 0.04 dollars lower than 139.85 dollars on the previous day.

OPEC calculates an average basket price based on 13 important brands produced by cartel members. (dpa)