Dual Fuel Engine
Dual Fuel or DF Engines are the type of engines which could work on a mixture of diesel fuel and gas fuel or it can run on diesel fuel alone. Duel Fuel engines can not operate on gas alone as 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.. For example, the fuel efficiency could be 5% to 8% less than in a comparable lean-burn, spark-ignited engine at 100 percent load. It could even be lower or higher loads.

Lift Truck Classification and Fuel Sources
There are some applications which have proved a challenge for the forklift. Like for instance, scrap metal is among these problems. To be able to successfully handle things like this requires using the correct type of machinery for the job.

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 several of these particular classes. The main power sources for forklifts comprise Gasoline, Battery, Diesel, Fuel Cell and Propane.

The most common overall are electric powered trucks, mostly in Class I, II and class III forklifts. In Classes V and IV, internal combustion trucks are more common. 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 powered units make up approximately 60 percent of the new forklifts sold within the USA. Their benefits include: less maintenance requirements, quiet operation, the ability to be utilized outdoors and inside with no harmful emissions.