Is it necessary to use premium gas in a Ford Focus ST?

I just bought a Ford Focus ST and was wondering if it's worth spending extra money on premium gas vs regular. Will it affect the performance of the car?

Yes, it is highly recommended to use premium gas in your Ford Focus ST to optimize performance and fuel efficiency.

No, regular gas will work just fine. Premium gas may contribute to slightly better performance, but it's not necessary to use it.

I've been using premium gas in my Ford Focus ST and have noticed a significant improvement in performance. It's worth the extra cost in my opinion.