Dual Fuel Engine
Dual Fuel or DF Engines are the type of engines which could operate on a mixture of gas fuel or diesel fuel or it can work on diesel fuel alone. Duel Fuel engines could not run 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 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. For instance, scrap metal is one of these issues. To be able to successfully handle things like this requires using the correct type of equipment for the job.

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

The most common overall are electric powered trucks, mostly 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, roughly over 90% are propane powered.

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