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

Because the engine is not a pure diesel engine and diesel is not a pure gas, this machine 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 spark-ignited, lean burn engine at 100% load. It could even be lower or higher loads.

Lift Truck Fuel Sources and Classifications
There are certain applications that have proved a challenge for the forklift. Like for instance, scrap metal is one of these issues. In order to successfully handle things like this requires utilizing the correct type of machinery for the job.

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

The most popular overall are electric powered trucks, mostly in Class III, II and class I forklifts. In Classes IV and V, internal combustion trucks are more popular. The most popular electric power source is the lead-acid battery. Among internal combustion trucks, about over 90 percent are fueled by propane.

The most popular power source for lift trucks is battery. Battery powered models make up roughly 60% of the new forklifts sold within the USA. Their benefits include: quiet operation, less maintenance requirements, the ability to be utilized inside and outdoors with no harmful emissions.