Trucks blocked wharves and all but one of the state's major fuel terminals
in the state capital, Melbourne.
Organizers said the blockades would stay in place until the drivers' demands for cheaper prices or higher rates were met.
Diesel prices have risen from $1.44 per gallon a year ago to more than $2.12
Oil companies say they will take what actions are necessary to to clear entrances to depots, including calling police.
A state motorists' group, the Royal Automobile Club of Victoria, said the
state government should declare emergency legislation to keep the fuel flowing.