I know I'm coming in very late to this forum, but so glad I found it. We just bought a certified used 2017 CT200h. We drove it home (about 40 miles) and noticed a significant drop in the gas gauge. this was concerning because the primary reason we bought it was for the mileage. I was hoping to find more information on here (as well as any other tips and tricks that may come along). We have only had it a week and a half, so still measuring out our actual mileage as the average MPG doesn't seem to be the actual MPG. We are driving in Eco but have heard Sport mode actually gets better mileage.... I see there is some debate on that and will look forward to combing through these threads to learn more about our CT hybrid. Thanks for the forum!