Ampol chief executive Matt Halliday says the push by the fuel group to try to capitalise on a "buy Australian'' sentiment which is accelerating among customers won't be undermined if the company decides to shut down the Lytton refinery in Brisbane.

Mr Halliday says Ampol is ''actively engaging'' with the Federal government which has a $2.5 billion fuel security subsidy package on the table, as the company moves to the final stages of its review into the Lytton refinery, with a decision likely in the second quarter of calendar 2021.