i think it is coincidence and maybe your patch failed due to coincidence or maybe the detergent pack ate it.

Yah gasoline is a commodity and the difference at the pump is what the additive package was when the tanker filled up.

I have driven for almost 40 years and never noticed a significant difference on any of my vehicles. I keep them fairly well maintained and run some fuel system cleaner thru them periodically so wild guess is my engines are running well enough that a minor difference in gas doesn't affect them.

Just my opinion,

Jim Henderson