What Happens to a Vehicle if the Engine Oil Is Not Changed

Starting a vehicle without engine oil is unimaginable. Similarly, there are recommended oil types for each vehicle. However, many people remember to maintain their vehicles but forget to change the engine oil. The damage it causes to the vehicle is indescribable. Yet, many are unaware of this.

That's why today, MotorGuide is informing you about what happens to your vehicle if you don't change the engine oil correctly.

What happens if engine oil is not changed?

If you don't change the engine oil, you will face many problems. Among these, increased wear, worse MPG, overheating, increased emissions, clogged systems, voided warranty, decreased resale value, and potential engine failures are primary. In short, delaying an engine oil change will bring you no benefits. So, always remember to change your engine oil within the correct time frame.

Overheating

Engine oil not only lubricates but also plays a crucial role in cooling certain engine parts. While race cars have oil coolers, in other vehicles, engine oil helps control the temperature. Delaying an oil change leads to increased friction and excessive heat. Ultimately, the engine can even break down.

Reduced Fuel Efficiency

Not changing the oil on time increases your fuel consumption. As a result of increased heat, reduced compression due to worn cylinders, and lack of cooling lead to decreased fuel efficiency.

Over time, this can significantly increase your fuel expenses, potentially even exceeding the cost of an oil change.

Increased Emissions

A decrease in fuel efficiency typically coincides with an increase in harmful emissions. This is primarily due to oil combustion caused by excessive engine wear.

A small amount of engine oil always enters the engine's combustion chamber. However, the more worn the cylinder walls become, the more oil enters, leading to harmful emissions.

Clogged Systems

Many complex mechanisms require good oil flow to function properly. Examples include variable valve timing, turbochargers, and engine breathers.

VVT or Vanos systems often utilize the engine's oil pressure to operate. These are extremely precise systems, and any decrease in oil pressure, quality, or viscosity can affect them.

Turbo damage and excess oil consumption

Commonly found in modern cars, turbochargers use energy from the exhaust to increase power and efficiency. Turbos are responsible for the modern size of small, high MPG-achieving engines found in Ford, Audi, and Volkswagen vehicles.

Turbos spin at incredible speeds, often exceeding 10,000 RPM. They require a significant oil supply to turn efficiently. A reduced oil supply can cause the turbine to overheat or fail.

Decreased Performance

Have you gone a long time without an oil change? And after finally changing the oil, haven't you felt your vehicle perform better than usual? Simply put, with fresh engine oil, the engine's moving parts can glide smoothly, allowing you to achieve very good performance.

So, these are the problems you will face if you don't change your engine oil within the proper time frame. Don't think about short-term gains and cause long-term damage to your vehicle. Therefore, make sure to change your engine oil within the correct intervals.