Of course, lower octane makes more BTU power per unit volume than higher octane does. I always run the lowest octane that doesn’t cause detonation to get the most power.
None of my cars require more than 93 octane since they are all 10.5 compression ratio or less.
I run 93 in the GTS and SRT, 89 in the 300C 5.7 Hemi and 87 in the Grand Caravan. Anything more is just more cost and less power.
