The council has added the Renault Kangoo vans powered by liquefied petroleum gas to its 372-strong fleet as part of its ongoing environmental initiative, which includes running electric vehicles.
Renault Liverpool delivered the vans, which will be used by the council's environmental health officers.
Ecogas carried out the conversions, which were part funded with a 60% grant from TransportAction PowerShift.
Liverpool council wants to reduce the impact of its fleet on health and the environment. LPG emits lower levels of carbon dioxide, nitrogen oxides and particulate emissions than either petrol or diesel. A spokesman said the council also chose the vehicles because LPG-powered vehicles offered significant fuel savings over their petrol counterparts.
'We have identified at least three fuel sites and are currently investigating the installation of our own tanks,' the spokesman said.
The deal takes the number of council vans running on LPG to 32. The 'green' fleet is made up of Ford Transit minibuses, which are used as minibuses for social services, and Ford Escort vans, which are used by the council's traffic signal engineers.
The council also has five electrically-powered Peugeot Partner vans, which are used by the transport department and pest control units.