One of the most important properties that changes over time in car engine oil is viscosity, which we talked about in the guide to buying engine oil. Engine oil becomes more concentrated after some time of use. And it gets more. Especially since oils absorb metal particles or iron shavings or any impurity inside engine components and this has a direct effect on increasing their concentration.
Engine oil that loses its standard state, It is not suitable for cooling, nor can it lubricate parts well. This state is something like the veins in the human body. Just as clogged arteries put a lot of pressure on the heart, improper engine oil also puts a lot of pressure on the car's propulsion system; The pressure that may increase the temperature of the parts, increase the friction of the parts and finally end the engine failure.
Golden Time to Replace Motor Oil
Oil changers usually say that the right time to change engine oil is every 5000 km or every 3 months (whichever comes first). We must say that it is true, but not for all cars!
Engine manufacturing technology, how to drive a car and even the type of engine oil used are very important and vital in determining the right time to change the engine oil. For example, some car manufacturers consider every 5,000 km as equivalent to every 6 months, but there are others who believe that you should change the engine oil every 12,000 km or every year.
As We said that engine manufacturing technology is also important in determining the right time to change engine oil. For example, engines that use a turbocharger system may need to change the engine oil sooner than other naturally aspirated engines. Even the type of fuel can be effective in determining when to change engine oil. For example, diesel engines usually need to change engine oil in a longer period of time (compared to gasoline engines).
Signs of Oil Replacement Time
Is your car sluggish? Is your car's engine making strange noises? Does the engine oil pressure gauge show lower than normal or is the oil light on? Even if your car doesn't have some of the more obvious signs of dirty and old oil, it's important to be able to tell when it's time to change your engine oil from some of the smaller signs.
Sometimes There are certain situations where you have to change the engine oil earlier than the recommended time (by the car manufacturer). These special conditions are usually accompanied by signs that tell you to change the car's engine oil as soon as possible.
1- The sound of ticking when the engine is turned on
When a car's engine is running, it is constantly pumping oil around the crankcase and cylinder heads, and after a while, the once-fresh, golden-colored oil, due to the heat as well as the absorption of soot from combustion. The engine becomes dirty and black. Dirty oil becomes heavier and its movement inside the engine becomes more difficult. This means that you will probably hear a ticking sound from the valve assembly when the engine is cold and running. The reason for the noise is that dirty oil takes longer to flow and lubricate the moving valve assembly.
2- In situ mode, the engine speed is high
Another sign of dirty oil can be high engine speed when idling, so that you feel the engine is working faster than normal. The reason for this can be the increase in friction between pistons, rings and bearings.
3- The acceleration of the vehicle is reduced
A well-lubricated engine can do its job without any problems, so when the oil gets old and dirty, the engine is not able to lubricate the moving parts well and as a result, it cannot The smoothness of the normal mode works. In this situation, the acceleration of the car will decrease and you will feel that the power of the engine is reduced.
4- The sound of a successive blow is heard from the engine
If the sound of successive knocks is heard from the engine when it is working, it may be due to old oil and dirt, which can eventually lead to the failure of the moving bearings. This problem causes the engine to vibrate while working on the spot, and as the engine speed increases, the knocking sound becomes louder. Unfortunately, if you hear such a sound from your car's engine, it is usually a sign of a major damage to your car caused by neglecting periodic service, and a simple oil change will not solve this problem at all.
5- Oil check lights on
If the engine oil light is on, do not ignore it at all, because this light usually means that the oil pressure inside the engine has dropped so much that the car cannot work properly. It is very important to know what to do when the oil light comes on, and your first step should be to quickly change the engine oil.