if synthetic does not protect more in comparison to mineral at high speed runs and are equally good in comfort than why is the whole world using these grades..

Are we trying to start a mineral vs synthetic discussion here?

If someone is having the money and want that 'added' protection and smoothness.. Why not synthetic?

And the comment - Someone has replaced the synthetic with mineral is completely ridiculous. A person using synthetic will come to know within 5 min run whether he has got synthetic or mineral.
Whats the guarantee that the mineral bottle does not contain cooking oil then.. The user cant make that out for sure.

Also synthetics are used where there are weather constraints, luckily our country do not come under those requirements.

Some guys will buy a Sony, some guys will buy an Akai. Its not Akai is bad.. It solves the purpose. But an Akai buyer should not force his buy on others.. So should be done by a Sony buyer.