It is genetic - in my family there is no history of it as it is a recessive gene but my mum and dad were both carriers. In Scotland up to 13% of the population has red hair, but around 40% of the population is thought to carry the recessive gene responsible for the world's rarest natural hair colour.
On the other hand, synthetic base oil molecules are chemically controlled, which provides increased ï¬ lm strength and lubricity over petroleum oils. The performance qualities of base oils have a marked impact on the performance qualities of the ï¬ nished product.
What is the difference between Regular Oil and Synthetic Oil? Synthetic motor oil flows easier and protects better than a conventional oil of the same grade. The chemical processes of creating a synthetic are very different than the simple refining techniques used to make conventional base oils. For conventional base oils the process is simply a separation and subtraction process.