XRS isn't only made in canada, other countries have been offering the car, under a different name...Corolla T sport in Europe....Hatch version......
GAS:
Premium = Highest performance and recommended for vehicles with High compression or turbos to prevent knock.
If you use lower octane gas, performance is less.
In some cases knock sensors cannot handle the difference between Premium vs Reg gas. So if reg was used often enough, it could damage the engine in the long run.
Manufactures recommend certain gas for good reasons.