I got a 2015 Corolla a year ago. It gets terrific gas mileage as long as I am not using the air conditioning. Even at higher speeds on Texas highways it gets pretty good gas mileage. But when I start using the air conditioning I can see the gas gauge literally slowly dropping. Also when I arrive somewhere and get out of the car it seems like there is an excess amount of condensation puddling under the car and running off. I have been paying attention to many other kinds of cars and trucks and I've only seen one truck that had what seems like excess condensation under the truck after it was parked. Is this normal for a Corolla? It doesn't seem like it should be using that much gas just because I have the air conditioner on.