Biodiesel is made from vegetable oil, such as soybean, animal fat, or recycled grease. Production of biodiesel has ramped up quickly over the last decade and use of approved blends in DAF, Kenworth and Peterbilt vehicles is on the rise as it is a low carbon fuel that is also biodegradable.
Compressed natural gas is made by compressing natural gas to less than one percent of its normal volume. Liquefied natural gas is produced by liquefying natural gas at extremely cold temperatures and storing it in cryogenic tanks. In this state it requires about 1/600th the storage volume of natural gas.
Liquefied natural gas is lighter than air. In the event of a spill, it disperses quickly without pooling on the ground creating a fire hazard like petroleum based fuels. It also has a higher ignition temperature making it less flammable than gasoline or diesel. It is low carbon and non-corrosive. Natural gas is the cleanest burning fossil-based fuel, producing up to 90% lower emissions than gasoline or diesel. With efforts dating back to 1996, PACCAR has been recognized as a pioneering market leader in the manufacture of trucks powered by natural gas.