Dual Fuel Engine
Dual Fuel or DF Engines are the kind of engines which could run on a mixture of diesel fuel and gas fuel or it can operate on diesel fuel alone. Duel Fuel engines could not run on gas alone since they do not posses an ignition system, nor do they possess 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 percent 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. For example, scrap metal is one of these problems. In order to successfully handle things like this requires using the right type of equipment 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 several of these particular classes. The main power sources for forklifts consist of Gasoline, Battery, Diesel, Propane and Fuel Cell.

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

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