Lubricant in motorcycle engine is very important. The lumbricant has functions of reducing the effect of friction and keeping the engine temperature. The lubricant must be able to penetrate into very narrow gap and must be fast lubricating. Without lubricant, engine will stop because of overheating and engine parts will be broken too.
Now, lubricant types are various. The most common type of lubricant used many people are 20W-50. This lubricant has thick viscosity. Lubricant of 20W-50 does not easily penetrate and make the engine moving slowly. Therefore, sport motorcycle needs thinner viscosity, 10W-30. Lubricant of 10W-30 can easily penetrate and engine can move faster. This lubricant is ussually used in high rotation engine such as motor racing and motor matic. This type of lubricant is ussually easy evaporated. When the engine is hot, the lubricant will evaporated cause of thin viscosity. So, people use in between type of lubricant, 15W-40 or 10W-40. If you tend to like thick viscosity lubricant but want to get faster lubricating, you can use 20W-40 lubricant.
So, what motor you have and what character you are, it determines the lubricant. Have a nice and safe riding.
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