BFG KO2 (or Falken WildPeaks) without lift on Badlands, 235/65/17 or 245/65/17 ??

[JohnSilver]

I don't know why people do this, but I've found this to be VERY common. I've had long discussions with folks regarding the use of premium fuel. Some swear on their children's eyes they get better fuel mileage using premium. I've been tracking fuel mileage on my Badlands since new (and on my EcoBoost Mustang previously). Based on my data there is no improvement in fuel economy using premium, at least in my car(s) for the way I drive.

Ha yes I've read quite a few discussions on that as well, and I'm in agreement after trying over several vehicles, no difference in mpg. Cognitive bias is a powerfull though process.

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