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

Because diesel is not a pure gas, and it is not a pure diesel designed engine, it has some disadvantages in the department of Methane slippage as well as fuel efficiency.. Like for instance, the fuel efficiency may 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 difficult for the forklift. Like for example, scrap metal is among these problems. In order to successfully handle items like this needs using the right type of machinery for the task.

There are 7 major lift truck classes, including power sources like 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 consist of Gasoline, Battery, Diesel, Fuel Cell and Propane.

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

The most common power source for lift trucks is battery. Battery powered units make up roughly 60% of the new forklifts sold within the United States. Their benefits include: quiet operation, less maintenance requirements, the ability to be used indoors and outdoors with no harmful emissions.