KIRKLEES Council wants to power its vehicles on "green" fuel.
It wants to run its fleet of 600 diesel vehicles on a mixture of normal fuel and environmentally-friendly biodiesel.
Biodiesel is made from renewable oil sources, such as soya, palm and rape seed, plus used cooking oil.
The move comes after successful trials by engine makers in mixing the two fuels. The manufacturers are giving warranties which allow 5% biodiesel to be mixed with normal diesel.
Clr Ann Denham, council Cabinet member for the environment, said adding biodiesel helped the normal fuel to go further and created fewer harmful has emissions.
She added: "Biodiesel does not add to the price of fuel. It reduces greenhouse gases and vehicles get more miles to the gallon.
"The council vehicle fleet uses 2m litres of diesel fuel a year," she said.
"To switch the whole fleet to biodiesel will cut the amount of normal diesel used by 100,000 litres.
"It will be a further example of the council's commitment to protect the environment," added Clr Denham.
The Cabinet's regeneration committee will decide whether to approve the plans on Friday, September 24.