Using DFCO to increase your MPG - Toyota Yaris Forums

adamschneider · 08-14-2007, 08:24 PM

I drove over the mountains twice last week and experimented with engine braking quite a bit on the downhills. (I have an automatic transmission.) I was experiencing the same thing that AustinYaris mentioned a few months back: with the exception of a few really steep hills, downshifting to 3rd slowed me down way too much, so I was having to put it in neutral to pick up speed again. As I understand it, DFCO doesn't kick in at all when you're in 4th ("D") in an AT, correct?

So, basically, when going down hills, I was in 3rd gear on the steep parts (which had the dual effects of activating DFCO and slowing down the car so as not to get out of control!), then I would bypass 4th and go into neutral for the shallower inclines. I didn't use D unless I needed to give it some gas. Does this sound like the best way to do it?

EDIT: I just saw Pavel Olavich's most recent post. Pavel, are you saying that the Yaris AT does go into DFCO mode even in 4th gear?

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08-14-2007, 08:24 PM	#11
adamschneider Drives: Bayou Blue 2dr, AT Join Date: Jun 2007 Location: Portland, OR Posts: 67	I drove over the mountains twice last week and experimented with engine braking quite a bit on the downhills. (I have an automatic transmission.) I was experiencing the same thing that AustinYaris mentioned a few months back: with the exception of a few really steep hills, downshifting to 3rd slowed me down way too much, so I was having to put it in neutral to pick up speed again. As I understand it, DFCO doesn't kick in at all when you're in 4th ("D") in an AT, correct? So, basically, when going down hills, I was in 3rd gear on the steep parts (which had the dual effects of activating DFCO and slowing down the car so as not to get out of control!), then I would bypass 4th and go into neutral for the shallower inclines. I didn't use D unless I needed to give it some gas. Does this sound like the best way to do it? EDIT: I just saw Pavel Olavich's most recent post. Pavel, are you saying that the Yaris AT *does* go into DFCO mode even in 4th gear?