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.
Synthetic oil benefits. When it comes to engine oil the man-made oil is better, because it reduces environmental pollution and ensures the long life of the engine than the regular oils. Also unlike the silk and polythene analogy synthetic oil is almost 3 times costlier than regular oil.