Victoria will have adequate petrol supplies despite the grounding of trucking company Cootes' Victorian fuel transport fleet, VicRoads says.
The company voluntarily agreed to immediately ground its fuel and LPG fleets over safety concerns, only days after a third of its large NSW operation was ordered off the road when major defects were detected.
VicRoads officers inspected 32 trucks and trailers on Friday and found major defects in 25.
Safety checks on fuel tankers revealed defects in brakes, shockers, air bags, loose bolts and oil leaks.
VicRoads acting boss Peter Todd said Friday's inspections were disappointing and Cootes' entire Victorian fleet will be independently inspected for roadworthiness.
But he said there is no need for Victorians to panic-buy petrol.
"We've got some advice that there will be plenty of fuel in Melbourne and in Victoria," he told reporters on Saturday.
"People shouldn't panic, they don't need to rush out and buy."
Last October, VicRoads grounded Cootes' prime movers and trailers for severe defects during a sweeping fleet review prompted by a fuel tanker explosion in Sydney that killed two people and involved a Cootes vehicle.
Cootes' had advised VicRoads it had improved its maintenance regime "significantly" since the October audit.
But the fresh audit, sparked by the company's NSW grounding on Monday, found some of the vehicles audited last October were again found to have defects, but for different reasons.
Further checks of Cootes' Victorian fleet will occur on Sunday at the company's LPG facility at Dandenong.
Mr Todd said none of the vehicles will be allowed back on the road until it is safe.
VicRoads will consider more regular audits, significant financial penalties and the company's ongoing accreditation, following the inspections, he said.
Trucks in Cootes' NSW fleet were pulled from service on Monday.
NSW Transport Minister Duncan Gay ordered full compliance inspections for all fuel and LPG tankers in the state after spot checks identified major defects in 17 vehicles.
In a statement, Cootes owner McAleese Group says it has been proactive in beginning inspections of its Victorian fleet by independent inspectors and it is working closely with regulators to address issues in the fleet.
Victorian opposition industrial relations spokeswoman Natalie Hutchins said VicRoads needs the resources to deal with safety issues but the government cut 500 jobs and $100 million from its budget.
"I think VicRoads need more resources not less resources to sort out these safety issues and the government needs to come to the forefront of recognising this is a crisis," she told reporters.
The Victorian government has been contacted for comment.