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

Since diesel is not a pure gas, and it is not a pure diesel designed engine, it has some disadvantages in the department of fuel efficiency, as well as Methane slippage.. 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 lower or higher loads.

Lift Truck Fuel Sources and Classifications
There are certain applications which have proved difficult for the forklift. Like for instance, scrap metal is amongst these issues. To be able to successfully handle things like this requires utilizing the right type of machinery for the job.

There are 7 major lift truck classes, including 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 include Diesel, Gasoline, Battery, Fuel Cell and Propane.

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

The battery is the forklifts most common power source. Battery fueled units make up roughly 60 percent of the new forklifts sold within the United States. Their benefits comprise: quiet operation, less maintenance requirements, the ability to be utilized indoors and outdoors with no harmful emissions.