Dual Fuel Engine
The Dual Fuel engine is a kind of engine which utilizes a mixture of gas fuel or diesel fuel or can run 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 utilize spark plugs.

Because the engine is not a pure diesel engine and diesel is not a pure gas, this machine does suffer from Methane slippage and fuel efficiency. For instance, the fuel efficiency can 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 some recycling materials handling applications which can prove very difficult for lift trucks. Like for instance, scrap metal is one of these problems. To be able to successfully handle things like this needs utilizing the correct type of machinery for the task.

There are 7 major lift truck classes, including power sources such as hydrogen fuel cell, liquid propane gas, diesel, electric and gasoline. The power source is linked to some of these specific 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 I, II and class III forklifts. In Classes IV and V, internal combustion trucks are more popular. The most popular electric power source is the lead-acid battery. Among internal combustion trucks, approximately more than 90% are powered by propane.

The most common power source for lift trucks is battery. Battery fueled models make up approximately 60% of the new forklifts sold in the USA. Their benefits consist of: less maintenance requirements, quiet operation, the ability to be used outdoors and inside with no harmful emissions.