Fuel octane rating and AFR query

[adamrshaw]

Hi All

Wondering if you could shed light and help with understanding

So let's say we are using shell v power 99ron and at WOT we have an AFR of say 11.0 - 1

Now if we were to use say regular unleaded 95ron would this lean out the AFR due to lower octane rating as sat in the same scenario be perhaps 11.3 - 1 at WOT ?

Thanks