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The primary function of a motor oil is to provide lubrication between moving metal parts in your engine. The friction caused by these parts as they move together creates high levels of heat that may cause damage to your engine unless a lubricant is introduced to the mechanism.
Once introduced, the lubricant smoothes the surfaces, enabling the parts to move freely against one another. This is a function that all motor oils perform quite well. However, a synthetic motor oil can bring added benefits to your engine's performance.
Chemistry 101
All lubricants fall into one of three categories: liquid (oil), semi liquid (grease) and solid (graphite). All three are derived from vegetable, mineral, or synthetic base stock, which are then processed to remove impurities, and bolstered with chemical additives.
Synthetic lubricants moreover, are manufactured specifically to stand up to severe conditions under which conventional oils might falter. They possess viscosity characteristics superior to those of mineral oils and the resulting lubricants have a molecular structure that is tailored to meet - and often exceed - manufacturers' criteria for high-performance engines.
Putting synthetics to the test
Among the many performance advantages that synthetic lubricants offer is their ability to remain stable at high temperatures (under which conventional oils begin to breakdown) and remain fluid at very low temperatures (under which conventional oils begin to thicken). This provides optimum lubrication at extreme temperatures, reduces wear and tear, and makes for a cleaner, more efficient engine.
Synthetics are also sometimes mixed with conventional oils to produce a cost-effective middle ground between the two, referred to as a 'blend'. However, while blends and conventional oils are both capable lubricants, the benefits are considerable when choosing a synthetic oil for your engine.
See the difference for yourself by getting an oil change at your local GM Goodwrench Dealer .
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