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 oil is referred to in the company of gasoline, crude oil is specifically what is intended. Crude or unrefined oil is also called petroleum. Petroleum is a naturally occurring liquid fossil fuel made up of multiple hydrocarbons and other organic compounds that can be found in rock formations of the Earthâs surface.fter the oil is distilled, it is used to make a variety of petroleum derivatives with fuel derivatives being the most common. Ad. The major difference between oil and gasoline is the fact that gasoline is a fuel derivative of oil.