I recently purchased a 2019 Pilot with AWD. I was curious to see what gas mileage I would be getting, both in normal and econ modes. After 2000 miles of mostly commuter driving, I see NO Difference in MPG between the two modes. Possible explanation is that since acceleration is reduced in Econ mode it makes me get on the gas a little harder to equal the acceleration on normal mode, thus bringing down the MPG I would have gained in econ mode. not much experience in strictly highway driving, so curious to see if it would be any better.