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

Because the engine is not a pure diesel engine and diesel is not a pure gas, this equipment does suffer from Methane slippage and fuel efficiency. 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 applications which have proved a challenge for the forklift. For example, scrap metal is one of these issues. In order to successfully handle things like this needs utilizing the correct kind of equipment 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 Battery, Diesel, Gasoline, Fuel Cell and Propane.

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

The most popular power source for lift trucks is battery. Battery powered models make up around 60 percent of the new forklifts sold within the USA. Their benefits comprise: less maintenance requirements, quiet operation, the ability to be used outside and indoors with no harmful emissions.