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.
on vehicles with high mileage it is not recommended to use full synthetic oil because it is thin and very free flowing and use of it does more often than not result in internal oil combustion i used full synthetic oil in a plymouth neonn vehicles with high mileage it is not recommended to use full synthetic oil because it is thin and very free flowing and use of it does more often than not result in internal oil combustion i used full synthetic oil in a plymouth neon