Higher Octane Gas in Summer ?

[Deamos]

I really noticed this in our 16 mazda 6.
91 octane in the summer was a HUGE difference, especially after getting off the highway.

Going to try 91 in our 15 odyssey on our upcoming 16hour road trip.

Oh yeah, this.

I've noticed similar in my CX5 when the weather is warm/hot.

Unfortunately, due to my personal budget constraints, I've had to deal with 87 during the extreme heat this summer, and hence worse gas mileage and sluggishness.

While I have measured better gas milage on 89, given the price difference right now I just can't afford the cost difference most of the time.

 

[addyguy]

My 2010 Kia Soul pinged more on regular in hot summer weather, less in winter. Premium reduced it.
My G5 doesn’t care at all.