Dual Fuel Engine
The Dual Fuel engine is a type of engine which uses a mixture of gas fuel or diesel fuel or can run off of diesel by its self. The dual fuel engine is not capable of running on gas alone. These engines do not have ignition systems and do not utilize spark plugs.

Because the engine is not a pure diesel engine and diesel is not a pure gas, this machinery does suffer from Methane slippage and fuel efficiency. Like for instance, the fuel efficiency can be 5% to 8% less than in a comparable spark-ignited, lean burn engine at 100% load. It can even be greater on lower loads.

Lift Truck Fuel Sources and Classifications
There are certain applications which have proved difficult for the forklift. For example, scrap metal is among these issues. In order to successfully handle items like this requires using the right kind of equipment for the task.

In this write-up, the 7 major lift truck classes are discussed, including the power sources such as hydrogen fuel cell, liquid propane gas, gasoline, diesel and electric. The power source is linked to some of these particular classes. The main power sources for forklifts consist of Gasoline, Battery, Diesel, Fuel Cell and Propane.

The most common overall are electric powered trucks, mainly in Class III, II and class I forklifts. In Classes IV and V, internal combustion trucks are more common. The most common electric power source is the lead-acid battery. Amongst internal combustion trucks, about over 90 percent are propane powered.

The most popular power source for lift trucks is battery. Battery fueled units make up roughly 60 percent of the new forklifts sold within the USA. Their benefits consist of: quiet operation, less maintenance requirements, the ability to be used indoors and outdoors with no harmful emissions.