Fuel saving semi trucks - Every Red Gold semi-truck is now equipped with an Auxiliary Power Unit, which is designed to reduce the amount of idle time fuel by 70%. This simple change is responsible for saving 168,000 gallons of fuel every single year. We then added a fuel management system, saving another 15,000 gallons yearly. Just because they’re big (and pretty) doesn’t mean they are wasteful.
An auxiliary power unit (APU) is a device on a vehicle that provides energy for functions other than propulsion. which is mainly used in large aircraft and naval ships.