A regular 87 is also unleaded.. means there is no lead additve in it.. as lead is harmful for humans when goes in air from engine combustion. I think its use is already limited for road vehicles.
So if the pump say unleaded it does not mean hi octane in Pakistan. I think in Pakistan, they should put octane rating as a headline on pumps rather saying Hi Octane along with regular, super , premium in whatever manner they define it.
Because what does Hi-Octane mean ? As it does not reflect the actual rating
Meanwhile Why Lead Used to Be Added To Gasoline