Air box is intact, filter is clean.
Haven't checked plugs or fuel filter... I probably should....it's just I'm not used to checking things like this on a NEW vehicle!
The gearing hasn't been changed at all....
And it has done this on two tankfuls of gas from different stations, both 87 octane.
I bought some super-concentrated efi/carb fuel cleaner....it says it has jet fuel in it or something, as a carrier. So to avoid pinging, I topped the tank off with 89 octane. I didn't feel like pumping 93, and the tank was already filled with about 2.5 gallons of 87...so I figured why waste the cash for the 93. It's enough cleaner for 21 gallons of gas...I'm running half the bottle per tankful. I'm hoping to see some improvement, but...I doubt it.