Dual Fuel Engine
DF or Duel Fuel Engines are the type of engines which can run on a mixture of gas fuel or diesel fuel or it can work on diesel fuel alone. Duel Fuel engines could not operate on gas alone as they do not have 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 fuel efficiency, as well as Methane slippage.. For instance, the fuel efficiency could 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 recycling materials handling applications which could prove really difficult for lift trucks. For instance, scrap metal is amongst these problems. In order to successfully handle things like this needs using the correct type of machine for the task.

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 several of these particular classes. The main power sources for forklifts include Battery, Diesel, Gasoline, Fuel Cell and Propane.

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

The battery is the forklifts most popular power source. Battery fueled models make up around 60 percent of the new forklifts sold within the USA. Their benefits consist of: less maintenance requirements, quiet operation, the ability to be utilized outdoors and indoors with no harmful emissions.