Natural gas trucks are trucks that use natural gas for fuel instead of gasoline or diesel fuel. They have engines that are similar to traditional gasoline-powered engines except for being powered by a special compressed natural gas fuel delivery system.
A few mainstream truck manufacturers offer models powered by natural gas. Conversion kits are available to convert traditional models to natural gas fuel systems. Another option is a combined natural gas and hydrogen-fueled engine. Natural gas fueled trucks have cleaner emissions than gasoline-powered models, which leads to longer lasting engines. They require less frequent oil changes because the engine oil stays cleaner.