How to check your car's oil?

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A lot of peoples face some difiiculties in knowing when to change engine's oil .if your car needs oil and you don't change it the voice of your engine will increase and the RPM will be high at low speed so it is very important to check your oil periodically or by knowing the number of Kilometers written on the new bottle of oil that you bought for your car.




Also when you find that your oil needs to be changed you should change the oil filter of your car and i am sure that the sound of your engine will decrease  when you change the oil.


The oil is the life blood of the engine, keep it clean and you'll get a lot of mileage and wear out of the engine.










To Know that your oil needs to be changed:

1)check if the oil on the dipstick is black or Take a look at the color of the oil. If it is dirty brown and smells burnt, or If the oil looks thick and dark in color.  then replace the oil and filter... 

 2)also inside your car the oil change light would turn on when oil needs to be changed..

USE:

Motor oil is a lubricant used in internal combustion engines. These include motor or road vehicles such as cars and motorcycles, heavier vehicles such as buses and commercial vehicles, non-road vehicles such as go-karts, snowmobiles, boats (fixed engine installations and outboards), lawn mowers, large agricultural and construction equipment, locomotives and aircraft, and static engines such as electrical generators. In engines, there are parts which move against each other causing friction which wastes otherwise useful power by converting the energy to heat. Contact between moving surfaces also wears away those parts, which could lead to lower efficiency and degradation of the engine. This increases fuel consumption, decreases power output and can, in extreme cases lead to engine failure. Lubricating oil creates a separating film between surfaces of adjacent moving parts to minimize direct contact between them, decreasing heat caused by friction and reducing wear, thus protecting the engine. In use, motor oil transfers heat through convection as it flows through the engine by means of air flow over the surface of the oil pan, an oil cooler and through the build up of oil gases evacuated by the Positive Crankcase Ventilation (PCV) system. In petrol (gasoline) engines, the top piston ring can expose the motor oil to temperatures of 320 °F (160 °C). In diesel engines the top ring can expose the oil to temperatures over 600 °F (315 °C). Motor oils with higher viscosity indices thin less at these higher temperatures.