The GST Council might on Friday consider taxing petrol, diesel and other petroleum products under the single national GST regime, a move that may require huge compromises by both central and state governments on the revenues they collect from taxing these products. The Council, which comprises central and state finance ministers, in its meeting scheduled in Lucknow on Friday, is also likely to consider extending the time for duty relief on COVID-19 essentials, according to sources in the know of the development.