Dual Fuel Engine
Dual Fuel or DF Engines are the type of engines which can work on a mixture of gas fuel or diesel fuel or it could operate on diesel fuel alone. Duel Fuel engines are not able to work on gas alone since they do not posses an ignition system, nor do they possess any spark plugs.

Since the engine is not a pure diesel engine and diesel is not a pure gas, this machinery does suffer from poor fuel efficiency and Methane slippage. Like for example, the fuel efficiency may be 5% to 8% less than in a comparable spark-ignited, lean burn engine at 100 percent load. It could even be lower or higher loads.

Lift Truck Fuel Sources and Classifications
There are certain recycling materials handling applications that can prove very difficult for lift trucks. Like for example, scrap metal is amongst these issues. In order to successfully handle items like this requires utilizing the correct kind of equipment for the task.

There are 7 major lift truck classes, including power sources such as liquid propane gas, hydrogen fuel cell, electric, gasoline and diesel. The power source is linked to several of these particular classes. The main power sources for forklifts include Diesel, Gasoline, Battery, Fuel Cell and Propane.

The most common overall are electric powered trucks, mostly in Class III, II and class I forklifts. In Classes IV and V, internal combustion trucks are more popular. The most common electric power source is the lead-acid battery. Among internal combustion trucks, about more than 90% are fueled by propane.

The most common power source for lift trucks is battery. Battery fueled models make up approximately 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.