Dual Fuel Engine
Dual Fuel or DF Engines are the type of engines which can work on a mixture of diesel fuel and gas fuel or it could work on diesel fuel alone. Duel Fuel engines are not able to operate on gas alone as they do not posses an ignition system, nor do they have 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.. For example, 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 lower or higher loads.

Lift Truck Classification and Fuel Sources
There are some recycling materials handling applications which could prove very challenging for lift trucks. Like for example, scrap metal is among these issues. In order to successfully handle items like this requires using the right kind of machinery 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, diesel, electric and gasoline. The power source is linked to some of these specific classes. The main power sources for forklifts comprise Diesel, Gasoline, Battery, Fuel Cell and Propane.

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

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