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They dont, diesel engines are generally more reliable than gas engines, and alot simpler due to the fact that the entire ignition system found in gas-powered engines is deleted entirely from the diesel equation. (Diesel engines don't have spark plugs, they rely on compression to ignite the fuel, meaning: they sqeeze the diesel fuel so much that it explodes)

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Q: Why do diesel engines require more maintenance?
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Why are diesel engine standard in heavy machinery and freight application?

Diesel engines have more torque especially at low rpms. This gives them much more pulling power. They also last much longer that gasoline engines. require less maintenance, and get better fuel economy.


Why diesel engines are preferred over petrol engines in agricultural fields?

More torque, less maintenance, longer engine life, and uses less fuel.


What type fuel should I use in my Utility Tractor?

Diesel tractors are superior to gas tractors because diesel engines have fewer maintenance issues and produce more useful energy.


Can you use a diesel battery in place of a petrol battery?

Batteries are basically the same for petrol or deisel engines, but diesel engines require more cranking force and demand a bigger battery. So a battery from a diesel engine is ok for petrol, providing it fits.


Are diesel engines more polluted than steam engines?

Of an individual diesel engine and an individual steam engine of the same energy output the diesel engine would be less polluting. It is far more efficient. However, there are far more diesel engines than steam engines in the world today so overall diesel engines pollute more than steam engines.


Which engine is more efficient diesel engine or gasoline engine?

Diesel engines are more efficient than gasoline engines.


What is the difference between petrol and diesel engines?

diesel engines doesn't use spark plug but uses heater plug.petrol engines produces more torque than petrol engines but petrol engines produces more acceleration than diesel engines.petrol engine is faster to be heated than diesel engine.


Which is more powerful petrol or diesel engine?

Normally Diesel engines produce more torque than gasoline engines but less horsepower. Gasoline engines rev up quicker and produce higher horsepower at higher rpms. Diesel engines develop their higher torque at lower rpms which allows a diesel to carry a heavier load.


Why does it take such a long time to jump start a diesel?

Diesel engines have such a high engine compression ratio, they require a more powerful starter, which in turn requires more battery power. That is why diesels have two batteries.


Why do diesel engines have more torque than gas engines?

Engines with longer piston stroke, higher turbo boost pressures, and diesel fuel has more energy in it than gasoline.


Which gives more mileage petrol or diesel?

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Which one having high torque petrol or diesel engines?

Diesel engines have much more torque at low rpm.