LONGER THAN EXPECTED MAINTENANCE WORK WILL HAVE A NEGATIVE IMPACT ON NESTE OIL'S RESULT

A planned short maintenance turnaround at Neste Oil's new diesel
line, commissioned at the Porvoo refinery this summer, has continued
longer than expected. The outage began at the end of September.
Initially there were problems with contamination of heat exchangers.
Following this, over 500 faulty valves were identified and had to be
replaced. A leakage found after the restart has further delayed full
production. It is now estimated that the line will be in production
in the early part of December."This extended outage has proved expensive for us, as the margins for
diesel fuel have been strong recently. Unfortunately we have also had
some other unplanned maintenance work and production issues ongoing
at the Porvoo refinery," says President & CEO Risto Rinne.

These problems affecting production at the site will have a
significant negative impact on Neste Oil's fourth-quarter result.

Further information:
CFO Petri Pentti, +358 (0)10 458 4490
Executive Vice President, Oil Refining Jorma Haavisto, +358 (0)10 458
4500


Neste Oil Corporation

Osmo Kammonen
Senior Vice President, Communications


Neste Oil Corporation is a refining and marketing company focused on
advanced, clean traffic fuels, with a strategy that prioritizes
growing its refining and premium-quality biodiesel businesses. Neste
Oil's refineries are located at Porvoo and Naantali in Finland, and
have a total refining capacity of approx. 250,000 bbl/d. The company
employs around 4,700 people and its shares are listed on the Helsinki
Stock Exchange. For further information, see www.nesteoil.com.