Dual Fuel Engine
The Dual Fuel engine is a type of engine that utilizes a mixture of gas fuel or diesel fuel or could operate 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 utilize 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.. For example, the fuel efficiency may be 5% to 8% less than in a comparable lean-burn, spark-ignited engine at 100 percent load. It could even be greater on lower loads.

Lift Truck Fuel Sources and Classifications
There are certain recycling materials handling applications which can prove very challenging for lift trucks. For example, scrap metal is amongst these problems. In order to successfully handle items like this requires using the right kind of machinery for the task.

There are 7 major lift truck classes, including power sources such as 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 comprise Diesel, Gasoline, Battery, Fuel Cell and Propane.

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

The battery is the forklifts most popular power source. Battery fueled units make up roughly 60 percent of the new forklifts sold within the USA. Their benefits include: quiet operation, less maintenance requirements, the ability to be used outside and inside with no harmful emissions.