[Ateam]

So as many of you all that is available at pump is 91 for me. I had been mixing 100 octane (5 gallons) in to achieve 93.8 roughly octane and really noticed a difference in the summer months of 105 degrees or even 80 degrees between the mix and regular 91 as far as pulling power.

Now that the temps are in the 50-60 range, I do not notice a difference in 91 or the mix of 93.8.

I am wondering if the outside temps being in this range or cooler is low enough to keep the air and engine cool enough to realize pretty much full sprak advance and less detonation compared to blistering hot weather?

Good news is do not need to pay extra for a few months. Costs about 23 extra dollars per tank to mix but still nice to save about 100 a month not having to do this!