Dual Fuel Engine
Dual Fuel or DF Engines are the kind of engines that could operate on a mixture of gas fuel or diesel fuel or it could operate on diesel fuel alone. Duel Fuel engines could not work on gas alone since they do not posses an ignition system, nor do they have 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 Methane slippage as well as fuel efficiency.. 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 can even be lower or higher loads.

Lift Truck Classification and Fuel Sources
There are certain applications that have proved a challenge for the forklift. Like for example, scrap metal is among these problems. To be able to successfully handle items like this needs using the correct type of equipment for the task.

In this write-up, the 7 major lift truck classes are discussed, including the power sources like 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 Diesel, Gasoline, Battery, Fuel Cell and Propane.

Electric powered trucks are the most common, mainly Class III, III and class I forklifts. Internal combustion engines are more common in Classes V and IV. The most popular electric power source is the lead-acid battery. Amongst internal combustion trucks, roughly over 90% are propane powered.

The battery is the forklifts most common power source. Battery powered models make up roughly 60% of the new forklifts sold within the USA. Their benefits include: quiet operation, less maintenance requirements, the ability to be used inside and outdoors with no harmful emissions.