[chulooz]

Originally Posted by Allch Chcar

That's about as clear as muddy water.

Thankfully there is also this.

2013 FR-S Product Technical Info and Specs (from Las Vegas press event)

I skimmed it without thinking about it and if you check the recommended fuel it says premium fuel required.

Any other questions?

The offical word from the manufacturer makes it crystal clear, its just dont.

Besides arguing for a point that even you wont be willing to support is almost like trolling...