It’s common knowledge that the engine of any vehicle functions as its beating heart, and without it, no form of transport would be possible, but this is even more true in the case of aircraft. Aircraft engines are responsible for the thousands of pounds of thrust responsible for transporting hundreds of people hundreds of feet up in the air, and they power the rest of the plane, too, which is why maintaining them is so important.

  1. Lubrication

Perhaps the most important job that aircraft engine oils perform is the fact that they reduce friction across the board, allowing the different components present in the engine to function properly without any risk of damage. Engines have a lot of moving parts, and the pistons contained within are often moving countless times a second; throughout this whole process, metal is rubbed on metal, generating heat and friction. If left unchecked, this could provide enough heat to start a fire, or even melt the plane, or could at least result in slower movement of pistons, which is why oil is so necessary, both to reduce friction and to allow pistons to move at their ideal speed and rate. 

  1. Reducing heat

As previously mentioned, heat is one of the major byproducts of an engine working normally since engines work by using fuel to create thousands of tiny, controlled explosions that power its functioning. This, coupled with the friction of pistons moving in and out, causes an immense buildup of heat that’s much stronger than the engines of other vehicles like cars and motorbikes since the aircraft engine is so massive and has so many moving parts. Engine oil helps to reduce friction, producing less heat, and insulates plane engines so they can lose heat faster, which is a feature you’d lose if your oil is not regularly maintained. 

  1. Keeping out foreign particles

Another indispensable job that engine oil provides is keeping out foreign particles and agents that may slide into the plane over several flights as time goes on. During a flight, or even when the plane is on the tarmac, there are particles of dust, debris, and even insects flying around, and they can get into the engine’s compartment easily, especially if you’re up in the air. Engine oil forms a protective barrier around your engine, which means dirt and dust will get trapped in the oil, and you won’t be able to get inside the engine, where it can cause havoc and destruction. If you don’t maintain your engine oil, you’ll lose this protective barrier, which means tiny particles could enter your engine, causing dust buildup and massive damage. 

  1. Risk of corrosion

Aircraft engines are meant to be used high in the air and across a variety of climates and weather types that can cause corrosion through a buildup of moisture and other contaminants. Engine oil forms a protective barrier against these agents just as it does with small particles. This means that if you cannot ensure the oil used in your engine is maintained or even changed if it’s in poor condition, your plane’s engine could begin to corrode, which will cause its shelf life to decrease by several years. 

  1. Safety 

No matter how many factors you can think of, the most paramount one is safety since an engine that does not have oil that’s maintained and checked regularly can never be truly safe. This means the engine in the plane can be rapidly damaged in a short time or even fail mid-flight, causing a terrible crash. If an institution realizes your planes aren’t maintained, you could be hit with fines, too, which will set you back a long way. 


The aircraft engine, like any engine in the world, runs on the basis of the various oils and components present in it, and these components help it to remain functional, minimize friction and damage, and provide hydraulic pressure. While replacing its oil may not seem like a top priority, it should absolutely be something you’re taking care of, and, using the information in this article; you’ll be able to understand why exactly that is and why engine oil forms such an important part of an average aircraft.