Poland-based oil company Grupa Lotos is planning to shut down its refinery for over a month in spring 2009 to bring its new installations on stream, according to Thomson Financial.

To boost its refining capacity, the company has launched a PLN5.6 billion upgrade plan, which will raise annual revenues to PLN20 billion by 2010.

Sokolowski, deputy chief executive of Grupa Lotos, said: We haven’t yet decided, how long the shutdown will last in 2009. Normally it takes about a month, in our case it could be longer.