Refined oils simply do not offer the design flexibility synthetics offer. Some are extremely safe in applications in which refined lubricants pose a fire or explosion hazard. Some base stocks are ideal for use in extremely cold environments, others are perfect for use in extreme heat.
Many different kinds of base stocks may be used to create synthetic lubricants, allowing a synthetic to be designed for virtually any application. Molecular uniformity also helps synthetics resist thinning in heat and thickening in cold, which helps them protect better than refined oils over a system’s operating temperature range and helps ensure secure sealing. Reduced friction increases energy through-put for greater fuel efficiency and power, and reduces heat and wear for longer equipment life. The base stocks from which synthetic lubricants are made feature uniform and smooth molecular structures, which ensures low friction as lubricant layers slide across one another. Lubricated systems stay cleaner and last longer with synthetics. Their resistance to breakdown also allows them to be used longer than refined lubricants can be used. Synthetic lubricants can be used in higher temperatures than refined lubricants without breaking down. The base stocks from which synthetic lubricants are made contain no sulfur, nitrogen or other elements that invite the formation of sludge and other products of lubricant breakdown. That gives them significant advantages over refined oils. Synthetic lubricants are chemically engineered from pure chemicals rather than refined from crude oil. Look up in the sky, every jet engine in the world is flying with synthetic oil in the engine and you think its not good enough for your H-D? I sometime wonder when I see questions like this if people understand what synthetic lubes are.
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