TSX-V SYMBOL: PSH
BULLETIN BOARD:PRRPF

September 28, 2004

Portrush to increase its stake in the Mission River project

Vancouver, B.C. - Portrush Petroleum Corporation and the McAlester Fuel Company are pleased to announce that Portrush has negotiated the right to increase its participation in the Mission River re-development project from its current 10% working interest up to a 29% working interest.

“The McAlester technical team lead by Mr. E.G. (Gregg) Wallace, Jr., has executed the initial stage of the re-development of the Mission River field in a very professional manner and results have exceeded expectations. Portrush is looking forward to its increased participation in the exciting Mission River project and its ongoing working relationship with the McAlester team”, said Martin Cotter, President of Portrush.

Contact: Martin Cotter, President

1(800)828 1866

This news release may contain forward-looking statements. Forward-looking statements address future events and conditions and therefore, involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements.

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