Dual Fuel Engine
DF or Duel Fuel Engines are the type of engines which could operate on a mixture of diesel fuel and gas fuel or it could operate on diesel fuel alone. Duel Fuel engines are not able to work on gas alone as they do not posses 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 Methane slippage as well as fuel efficiency.. Like for example, the fuel efficiency can be 5% to 8% less than in a comparable lean-burn, spark-ignited engine at 100% load. It can even be greater on lower loads.

Lift Truck Fuel Sources and Classifications
There are certain applications that have proved a challenge for the forklift. Like for example, scrap metal is among these issues. In order to successfully handle items like this needs using the correct kind of machinery for the task.

There are 7 major lift truck classes, including power sources like liquid propane gas, hydrogen fuel cell, electric, gasoline and diesel. The power source is linked to some of these particular classes. The main power sources for forklifts comprise Diesel, Gasoline, Battery, Propane and Fuel Cell.

The most popular 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. Out of internal combustion trucks, roughly over 90 percent are powered by propane.

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