Dual Fuel Engine
Dual Fuel or DF Engines are the kind of engines that could operate on a mixture of diesel fuel and gas fuel or it can run on diesel fuel alone. Duel Fuel engines could not operate on gas alone since they do not have an ignition system, nor do they have any 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 fuel efficiency, as well as Methane slippage.. Like 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 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 issues. To be able to successfully handle things like this needs using the right type of machine for the task.

In this write-up, the 7 major lift truck classes are discussed, including the power sources such as liquid propane gas, hydrogen fuel cell, diesel, electric and gasoline. The power source is linked to some of these particular classes. The main power sources for forklifts include Gasoline, Battery, Diesel, Fuel Cell and Propane.

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

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