Fugitive father and son Gino and Mark Stocco are believed to be running out of money – and police expect they will slip up soon.

Gino, 58, and Mark, 35, have been on the run for eight years and are currently thought to be in New South Wales or Victoria.

Authorities now believe the armed fugitives have survived off stockpiles of supplies hidden in bushland.

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Victoria Police assistant commissioner Rick Nugent said it was likely the pair were running out of money after they stole $200 worth of fuel from a South Gundagai service station on Saturday.

“They do need fuel, they were paying for fuel for a little while,” Mr Nugent told 3AW on Monday.

“Then on Saturday night they drove off without paying.

“Our belief is they’re running out of money.”

Police want to charge the pair with attempted murder after they fired on two NSW police vehicles last week.

They were believed to travel hundreds of kilometres in a stolen Toyota LandCruiser 4WD – a common rural vehicle – each day to evade police.

The Stoccos have used four different sets of number plates on their 4WD ute.

“In the rural area, it is probably the most common 4WD and we are getting leads that turn out not to be right,” Mr Nugent said.

“But we would much prefer to have that information and discount it than not get that information.”

The Stoccos’ life of crime began 12 years ago when Gino’s marriage broke down and he bought a $100,000 yacht, Sydney Morning Herald reported.

They defrauded people as they travelled from Taree, NSW, to Victoria.

They were caught in December 2006 and were each sentenced to a short stint in jail and hundreds of dollars in fines.

They allegedly re-offended after their release.

Wagga Wagga Local Area Command crime manager Darren Cloake said detectives intend to charge the Stoccos with 13 offences each – including attempted murder – after the pair shot at NSW police during separate chases on October 16.

Police have urged the public to continue reporting possible sightings but not to approach the men, who have a high-powered rifle and are considered dangerous.

-with AAP