Petrol prices have hit their highest point in two years and it is time for Australians to fight back, the Australian Competition and Consumer Commission says.

In its latest quarterly petrol report, the ACCC found that average petrol prices in Australia’s five largest cities jumped significantly in December last year and that gross retail margins have reached their highest levels since the ACCC began monitoring them in 2002.

This is of little surprise to aviation worker Simon Grubb who fills the 90 litre tank on his Landcruiser twice a week.

Simon Grubb has favoured stations with lower prices Credit:Eddie Jim

Filling up with diesel at a Metro station in downtown Melbourne, Mr Grubb said he was "very aware" of prices and has favourite petrol stations.