what is 5
what is what is 30...... and et thanksssHow to choose right motor oil ?
5 is when cold it is as thick a a 5 grade oil and 30 is when it is hot it is as thick as a 30 grade oil, the number equates too the viscosity of the fluid the higher the number the thicker it is, the reason why it has 2 nubers is because it is designed to act like a 5 weight oil when a 5 weight oil is cold but a 30 weight oil when a 30 weight oil is hot, when a 5 weight oil is hot it is really really really thin and not good enough so the oil is designed to give the best abilitys of 2 types of oil so it is thinnish when cold so it still works when cold and it isnt alot thinner when hot so it still works when hot, without drawing a graph it is pretty difficult to explain it but i have done the best i canHow to choose right motor oil ?
The numbers listed on the motor oil are commonly referred to as the ';weight'; of the oil. They are a representation of the viscosity, or thickness of the oil at given temperatures. Common motor oils such as your example of 5W30 are a multi-grade oil. The first number indicates the base viscosity at a colder temperature, i.e, cold winter starts (and the ';W'; meaning winter) and the second number indicates the viscosity at normal engine operating temperatures (I believe based on an operating temperature of 100 degrees C).
When selecting which grade motor oil to choose, consider the temperature extremes the engine will encounter. Is the climate cold? Is it winter? Do you live in Miami? It is also a good rule of thumb to try, if at all possible, to keep the narrowest span of viscosity or least difference in the numbers on the bottle so that less additives (polymers) are needed in the oil.
Something else to consider woulf be switching to a full synthetic oil. Since synthetic oils are man made all the molecules are the same size therefore will flow consistently and provide better protection for your engine.
No comments:
Post a Comment