Dual Fuel Engine
The Dual Fuel engine is a type of engine that utilizes a mixture of gas fuel or diesel fuel or can operate off of diesel by its self. The dual fuel engine is not capable of working on gas alone. These engines do not have ignition systems and do not use spark plugs.

Since the engine is not a pure diesel engine and diesel is not a pure gas, this machinery does suffer from poor fuel efficiency and Methane slippage. For example, the fuel efficiency could be 5% to 8% less than in a comparable spark-ignited, lean burn 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. Like for instance, scrap metal is one of these issues. To be able to successfully handle things like this requires utilizing the right type of machine for the task.

There are 7 major lift truck classes, including power sources like hydrogen fuel cell, liquid propane gas, electric, gasoline and diesel. The power source is linked to several of these specific classes. The main power sources for forklifts include Gasoline, Battery, Diesel, Fuel Cell and Propane.

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

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 comprise: less maintenance requirements, quiet operation, the ability to be utilized inside and outdoors with no harmful emissions.