Can you run the Fiesta ST 1.6L on Regular 87 Octane?

[RBYM]

Can you run the Fiesta ST 1.6L on 87 octane and go full throttle safely? In CA all we have is a maximum of 91 octane but I rarely go full throttle. I just just wondering if it’s safe to go wot on 87 octane?

 

[Grsemky]

Yes factory maps allow 87 at reduced power, however I recommended staying with 91.. I'm in AZ with the same shitty gas and never used less than 91

 

[RBYM]

Yes factory maps allow 87 at reduced power, however I recommended staying with 91.. I'm in AZ with the same shitty gas and never used less than 91

Sweet thank you!

 

[Intuit]

If you're at high elevation, pay attention to the octane. 85 might still be sold as "regular"? If so, avoid it. 87 or higher. Higher elevations being less prone to knock, apply for naturally aspirated engines, but not necessarily for boosted engines.