Didn't realize how nice smart preconditioning was until it was turned off to save energy while parked during a recent trip. I forgot to turn in on afterwards and wow there is a noticeable difference getting into a preconditioned car. Anyway, I just turned it back on - yay! - and got to wondering about those extra kwh being used. Has anyone tracked the extra energy usage for preconditioning? It obviously uses more energy, but is it a lot more?