engines
There are many internal combustion engines powered by gasoline, diesel, propane, or natural gas; hybrid vehicles, plug-in hybrids, hydrogen-powered fuel cell vehicles, and all-electric vehicles. Fuel-powered vehicles have an advantage due to their limited range and high battery costs. Some options require a network of refueling or charging stations.
Before starting the adjustment, flush the oil chamber of the pump and regulator with clean diesel fuel and fill with fresh engine oil up to the level of the drain hole. For the duration of the test, plug the drain fitting