Trucks and vans collecting and delivering items from the DPD hub in Athlone will all be powered on Hydro treated Vegetable Oil from now on.
The move was announced by the parcel-delivery company this week as part of its commitment to a greener business model.
The company says it will reduce its carbon emissions by over 80%.
The vans and trucks don't have to be converted to burn the biofuel, although it is more expensive than diesel at the moment.
Speaking on the Let's Talk show today, CEO Des Travers says they intend to fully decarbonise their fleet by 2030.
He says the measure will make them the most sustainable parcel delivery company in the country.
"HVO reduces the carbon emissions by 87% and it's the right thing for our business to do and we've decided to invest in this. It's about seven cent more expensive than diesel but the with the emission reduction, we're quite happy that we can bear the cost of this. HVO is only a three or four year journey until electric trucks and hydrogen trucks come along so it's a cost we're willing to bear until the technology catches up".