What's the difference between synthetic and mineral oil?
Synthetic lubricants are made up of molecules that have been modified under complex chemical processes and allow for enhanced performance under extreme conditions of temperature, pressure and forces. Mineral lubricants are composed of molecules present in crude oil that are separated in the distillation process at a refinery.
What is viscosity?
A liquid that has a relatively high resistance to flow can be described as viscous. For example, water has a low viscosity compared with honey, so in this case honey has a higher viscosity than water under the same temperature. A good quality lubricant keeps its viscosity steady under different temperature and usage conditions for a longer period of time.
What is a multigrade oil?
Lubricants that are able to maintain their performance in high and low temperatures are called multigrade. They are defined by two numbers. The first (followed by a W) indicates the lubricant’s viscosity under lower temperatures. The second and higher number indicates the lubricant’s viscosity under greater temperatures. A multigrade lubricant minimises viscosity differences under temperature variations.
What are additives and why are they used?
Additives are chemical compounds which, when added to base oils, improve the performance of the lubricants, protecting them from aging and allowing them to respond to all the demands of the modern engine. The blend of various additives is what sets a quality lubricant such as Shell Helix apart from the competition.
My oil consumption is very high. Why?
You would be wise to check for faults, taking into account the type of engine, its age and the driving conditions to which it has been exposed. Faults could be caused by a leak in junctions or seals, wear to pistons or cylinders, or deposits limiting the lubrication of some surfaces.
Does the colour of the oil mean anything?
The colour of an oil has no special meaning, but depends on a number of factors, such as the refining process and the types of base oils, additives and crude oil used. Oil may turn a darker colour after use because it contains a number of suspension particles – the reason for this is that oil cleans the engine of particles and other deposits produced by the high temperature combustion, keeping the particles in suspension to avoid depositing them on the engine’s surface.
What do the classifications and specifications on the back of the pack mean?
Lubricants vary in their use and quality. Some are only suitable for particular engines, while others can only be used in certain climates. Even two oils optimised for the same engine and climate conditions can have vastly different levels of performance. Universal criteria to describe oil performance and usage are therefore used.
Synthetic lubricants are made up of molecules that have been modified under complex chemical processes and allow for enhanced performance under extreme conditions of temperature, pressure and forces. Mineral lubricants are composed of molecules present in crude oil that are separated in the distillation process at a refinery.
What is viscosity?
A liquid that has a relatively high resistance to flow can be described as viscous. For example, water has a low viscosity compared with honey, so in this case honey has a higher viscosity than water under the same temperature. A good quality lubricant keeps its viscosity steady under different temperature and usage conditions for a longer period of time.
What is a multigrade oil?
Lubricants that are able to maintain their performance in high and low temperatures are called multigrade. They are defined by two numbers. The first (followed by a W) indicates the lubricant’s viscosity under lower temperatures. The second and higher number indicates the lubricant’s viscosity under greater temperatures. A multigrade lubricant minimises viscosity differences under temperature variations.
What are additives and why are they used?
Additives are chemical compounds which, when added to base oils, improve the performance of the lubricants, protecting them from aging and allowing them to respond to all the demands of the modern engine. The blend of various additives is what sets a quality lubricant such as Shell Helix apart from the competition.
My oil consumption is very high. Why?
You would be wise to check for faults, taking into account the type of engine, its age and the driving conditions to which it has been exposed. Faults could be caused by a leak in junctions or seals, wear to pistons or cylinders, or deposits limiting the lubrication of some surfaces.
Does the colour of the oil mean anything?
The colour of an oil has no special meaning, but depends on a number of factors, such as the refining process and the types of base oils, additives and crude oil used. Oil may turn a darker colour after use because it contains a number of suspension particles – the reason for this is that oil cleans the engine of particles and other deposits produced by the high temperature combustion, keeping the particles in suspension to avoid depositing them on the engine’s surface.
What do the classifications and specifications on the back of the pack mean?
Lubricants vary in their use and quality. Some are only suitable for particular engines, while others can only be used in certain climates. Even two oils optimised for the same engine and climate conditions can have vastly different levels of performance. Universal criteria to describe oil performance and usage are therefore used.
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