There are so many variables,stay SAFE and read your plugs!

https://www.google.com/search?q=octane+required+for+compression+ratio+charts&tbm=isch&source=iu&ictx=1&fir=I5vBMm4xO5y2BM%253A%252C19J5ko9OrKSMqM%252C_&vet=1&usg=AI4_-kSJNUY5iVTnNmn9DMOptHP38VXfTA&sa=X&ved=2ahUKEwj02ryc1YXkAhUshOAKHV1VCs4Q9QEwEXoECAkQFQ#imgrc=lKy3u_EFLFr_SM:&vet=1


HEMI-ITIS has no cure.
My condition is fully BLOWN!!