Dual Fuel Engine
Dual Fuel or DF Engines are the kind of engines which could 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 run on gas alone as they do not have an ignition system, nor do they possess any spark plugs.

As 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.. 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 could even be greater on lower loads.

Lift Truck Classification and Fuel Sources
There are some applications which have proved a challenge for the forklift. For example, scrap metal is one of these issues. In order to successfully handle items like this needs using the correct type of machinery for the task.

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

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

The battery is the forklifts most common power source. Battery powered models make up roughly 60 percent of the new forklifts sold in the United States. Their benefits comprise: quiet operation, less maintenance requirements, the ability to be used inside and outside with no harmful emissions.