Dual Fuel Engine
DF or Duel Fuel Engines are the kind of engines which could work on a mixture of diesel fuel and gas fuel or it could operate on diesel fuel alone. Duel Fuel engines could not operate on gas alone since they do not posses an ignition system, nor do they have any spark plugs.

Since 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 percent load. It can even be lower or higher loads.

Lift Truck Fuel Sources and Classifications
There are some applications which have proved a challenge for the forklift. For example, scrap metal is amongst these issues. In order to successfully handle things like this needs using the correct type of machine for the job.

In this write-up, the 7 major lift truck classes are discussed, including the power sources such as liquid propane gas, hydrogen fuel cell, gasoline, diesel and electric. The power source is linked to several of these particular classes. The main power sources for forklifts include Gasoline, Battery, Diesel, Propane and Fuel Cell.

Electric powered trucks are the most common, mostly 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 powered models make up around 60% of the new forklifts sold within the USA. Their benefits comprise: quiet operation, less maintenance requirements, the ability to be utilized inside and outdoors with no harmful emissions.