One of the engine oil’s many primary function, as most, will know, is to lubricate the engine, providing a micro-thin oil film, acting as a barrier between the many internal moving parts to minimize friction, heat build-up and of course, wear and tear. It also acts as a cooling agent, carrying away heat generated from the friction to the oil sump. The engine oil helps to prevent contamination and deposit build-up by leading away debris and dirt from the critical areas within an engine to the oil filter where they will be trapped. Harmful toxic waste will be neutralized by the detergent present in the engine oil to arrest corrosion and rust.
However, all good things must come to an end and so do engine oils. Constantly subjected to heavy loads, the oil will eventually break down, and with that, its protective cleaning and cooling properties will also start to diminish. As for the useful lifespan of the engine lubricant, it depends mainly on the type of oil (mineral, semi-synthetic or fully synthetic) and the “abuse” that it will encounter. A general rule of thumb is that mineral oil will last around 5,000 km, semi-synthetic 7,500 km and fully synthetic 10,000 km.
What makes an oil mineral, semi-synthetic or fully cbd oil vancouver synthetic? On the whole, lubricants are made up of a base or stock fluid, which constitutes most of the finished product, and additives. If the base is derived from petroleum crude oil, the engine oil will be of the “mineral oil” category. On the other hand, oils using stock fluids developed in the lab from chemical synthesizing will be of the fully synthetic nature. Semi-synthetic oil is, to simply put it, a blend of mineral oil and fully synthetic oil.
The two most important bits of information that one should check when selecting an engine oil for your car are its SAE (Society of Automotive Engineers) viscosity grade and the quality indicators of an engine oil.
The viscosity of an oil refers to its “flowability”, and it changes with temperature. At low temperatures, an oil’s viscosity is high (thick), dipping (thins out) as the temperature climbs. Unfortunately, the requirements asked of an engine lubricant are just the opposite. An engine needs a low-viscosity engine oil – which circulates much more quickly than a high-viscosity oil – at cold so that the oil can reach all parts of the engine in as short a time as possible, protecting the components from wear. For the uninitiated, most of the engine wear occurs during start-up. During normal operation, the engine needs a sufficiently thick oil film to properly protect its fast moving components and thus the need for a high-viscosity oil. This is where multigrade oils come in.