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.
When you change your car's engine oil you have a lot of choices, including the use of synthetic oil or conventional oil.Most wonder what the benefits are of using synthetic vs. conventional oil. And if it's really worth the money. Conventional motor oil is a lubricant that is derived directly from crude oil.ost wonder what the benefits are of using synthetic vs. conventional oil. And if it's really worth the money. Conventional motor oil is a lubricant that is derived directly from crude oil.