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 can not run on gas alone because 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 example, the fuel efficiency may be 5% to 8% less than in a comparable lean-burn, spark-ignited engine at 100% load. It can even be lower or higher loads.

Lift Truck Fuel Sources and Classifications
There are some applications which have proved difficult for the forklift. For instance, scrap metal is amongst these issues. To be able to successfully handle things like this requires using the correct type of machine for the job.

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

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 popular electric power source is the lead-acid battery. Among internal combustion trucks, about more than 90% are propane powered.

The most common power source for lift trucks is battery. Battery fueled models make up roughly 60 percent of the new forklifts sold in the USA. Their benefits include: quiet operation, less maintenance requirements, the ability to be utilized indoors and outside with no harmful emissions.