Dual Fuel Engine
Dual Fuel or DF Engines are the type of engines that can work on a mixture of gas fuel or diesel fuel or it can run on diesel fuel alone. Duel Fuel engines are not able to run on gas alone since they do not posses an ignition system, nor do they have any spark plugs.

As the engine is not a pure diesel engine and diesel is not a pure gas, this equipment does suffer from poor fuel efficiency and Methane slippage. 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 lower or higher loads.

Lift Truck Classification and Fuel Sources
There are certain recycling materials handling applications that could prove really difficult for lift trucks. Like for instance, scrap metal is among these issues. In order to successfully handle items like this needs utilizing the correct type of machine for the job.

There are 7 major lift truck classes, including 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 consist of Gasoline, Battery, Diesel, Fuel Cell and Propane.

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

The most popular power source for lift trucks is battery. Battery fueled units make up about 60 percent of the new forklifts sold in the United States. Their benefits consist of: less maintenance requirements, quiet operation, the ability to be used outdoors and inside with no harmful emissions.