Dual Fuel Engine
The Dual Fuel engine is a type of engine that uses a mixture of diesel fuel and gas fuel or could work 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 could be 5% to 8% less than in a comparable lean-burn, spark-ignited engine at 100% load. It can even be greater on lower loads.

Lift Truck Classification and Fuel Sources
There are some applications that have proved a challenge for the forklift. Like for example, scrap metal is one of these problems. To be able to successfully handle things like this needs using the correct type of equipment for the job.

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 Diesel, Gasoline, Battery, Fuel Cell and Propane.

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

The battery is the forklifts most common power source. Battery powered units make up around 60 percent of the new forklifts sold in the United States. Their benefits include: less maintenance requirements, quiet operation, the ability to be used outside and inside with no harmful emissions.