In 1980 the plant was reconstructed and started diesel hydrotreating unit with capacity of two million tonnes per year.

The main fractionation tower K-5 weighing 335.2 tons, diameter of 5 m and a length of 62 m was delivered by "Spetstyazhavtotrans" from the factory "Dzerzhinskhimmash".

In 1987 Kirishineftekhimexport subdivision of Kirishinefteorgsintez was founded to conduct external economic activity of the company.

[2] In December 1994, the refinery opened a plant for the production of roofing and waterproofing, sound-proof roll material, as well as bitumen-polymer mastic hot applications.

During the 1990s, Andrey Akimov, who was managing director from January 1991 to 20 November 2002 at the Swiss financial company IMAG GmbH in Vienna (Austria), worked closely with the administration of the Governor of St. Petersburg Anatoly Sobchak and especially Vladimir Putin to provide more than $1 billion in foreign finance for the reconstruction of the Kirishi oil refinery (Russian: Киришинефтеоргсинтез), which is the largest oil refinery in Russia based upon the amount of fuel produced.