Engine lubricant is the blood of your machine. Here we answer some of the most common queries.
What Is Engine Lubricant?
Oil can be defined as a biochemical compound. It will not blend with water and is a fluid. Motor lubricants are derived from basic oil with additives. These are mixed in to improve their properties. The most significant of which is viscidness. There are three important pieces of info to look for on a bottle of lubricant.
- Viscosity for example 10W-40 or 20W-50
- Category – synthetic, part-synthetic or inorganic
- Performance specifications (e.g. API or JASO)
What Is Viscidness?
The meaning of viscidness is a measure of a liquid’s resistance to movement. Oil needs to be dense enough to uphold a suitable lubricating film for the touching parts. However, it also needs to be thin enough to move easily around them. As the machine gets warmer, the lubricant becomes less viscid. This is where possible problems can happen. If viscidness becomes excessively low, the greasing oil film might start to collapse. This can lead to motorised failure. Certain inferior engine lubricants may have what is named poor shear solidity. This is when the shearing action inside the machine causes irreparable viscosity loss. The SAE recognised a mathematical code scheme for classifying motor lubricants. It shows the viscidness rating. At one time oils were categorised as mono–grades. This meant they were inappropriate for use as year round oils. They need to be altered to the suggested viscosity. This depends on the differences in temperature.