I have a question for anyone who understands DFCO in the AT Yaris. I am under the impression that the DFCO will not kick in if the shifter is in D, but I don't understand why. The way the car downshifts for engine braking, the car feels exactly the same coming down a hill in 4th if I tap the brake pedal to shift down to 3rd or tap the shifter into 3rd. Why would the ECU not use DFCO in the former, but will in the latter? Assuming that this is the case, is it best to drive in D and tap the shifter into 3rd when I want to use DFCO (so as not to lose the FE benefits of OD/4th when accelerating any other time)? If you have one, how do you drive your AT Yaris with regard to DFCO?