Maybe.
Gotta be careful here. These engines have knock sensors for a reason. PING (Pre-Ignition, AKA Knock) is VERY detrimental to an engine. A little can cause huge damage if sustained. You will also lean out the engine a little which increases heat. Yes, you will most likely get slightly...
My spreadsheet is nearly identical.
I also added "lifetime" average gas mileage at the bottom. I am at 11.5 for a 4 year average. That's across about 60K to 80K miles total. So, when I'm planning a trip, I base it on the 11.5 average.
Yes, I have actually run out of fuel as I coasted to the...