Coasting in neutral vs. DFCO? - Toyota Yaris Forums

matti · 09-17-2012, 08:41 AM

I've been using DFCO as much as possible in my 2012 Yaris L (5-spd) as I realize it's an easy way to reduce some fuel consumption. I came across an ecomodder.com website that gives fuel-saving tips:

http://ecomodder.com/forum/EM-hyperm...ecodriving.php

#44 on the list states that coasting in neutral (with engine idling) is a better option than coasting in DFCO mode. I was under the impression that DFCO was better than coasting in neutral? Any thoughts? Thanks.

WeeYari · 09-17-2012, 08:57 AM

It's a juggling act using both DFCO and neutral to achieve best results.

If using DFCO slows you down too quickly and you end up needing to apply gas sooner than desired, then you've lost some of the gain.

NEexpat · 09-17-2012, 01:01 PM

If I had a 5 speed I'd be tempted to bump that thing into neutral every chance I got. Since I have the auto I'll stick with DFCO.

My car before my Yaris was a 1988 honda Accord LXI 5 speed, and I could squeeze 36 mpg in the summer 32 mpg winter. The gas tank was 15.9 gl. Which put its range out past 550 miles in the summer.

I think that car spent more time in neutral than in gear. Of course that was an 80's car, no DFCO.

new-yaris-owner · 09-17-2012, 06:49 PM

if you put it in neutral with automatic transm. would it be ok to change it to Drive while moving ?

edmscan · 09-17-2012, 09:00 PM

Quote:

Originally Posted by new-yaris-owner

if you put it in neutral with automatic transm. would it be ok to change it to Drive while moving ?

Personally .. I wouldn't be messing with an Automatic transmission much ... as in order to save yourself a few bucks in gas, you may wreck a very expensive transmission. Standard transmissions are a different animal.

If I had an automatic transmission .. I would take my foot off the gas and use DFCO as much as I could but leave the car in gear to lessen the wear on the transmission.

tooter · 09-18-2012, 01:40 AM

Quote:

Originally Posted by edmscan

Personally .. I wouldn't be messing with an Automatic transmission much ... as in order to save yourself a few bucks in gas, you may wreck a very expensive transmission. Standard transmissions are a different animal.

If I had an automatic transmission .. I would take my foot off the gas and use DFCO as much as I could but leave the car in gear to lessen the wear on the transmission.

I'd do the same if I had an auto trans, because the fluid coupling allows the engine to slightly "freewheel" while in the highest gear. Add that to DFCO and mileage is going to go up.

I don't coast in neutral with my stick because when the engine is idling it's still using gas, whereas coasting in gear raises the engine rpms above idle and activates the DFCO. Then it doesn't matter how fast the engine is turning because it's not using any gas anyways.

Just stick it in 5th and put both feet on the floorboard.

matti · 09-18-2012, 10:40 AM

Thanks everyone. I think I'll just continue to use DFCO vs. putting it in neutral while coasting.

goliath1812 · 09-18-2012, 01:59 PM

Unless I'm planning on slowing down or coming to a stop, I prefer to neutral coast. It has given me the best MPG results.

09-17-2012, 08:41 AM	#1
matti Drives: 2017 Yaris L (5sp manual) Join Date: Jun 2012 Location: upper midwest Posts: 345	Coasting in neutral vs. DFCO? I've been using DFCO as much as possible in my 2012 Yaris L (5-spd) as I realize it's an easy way to reduce some fuel consumption. I came across an ecomodder.com website that gives fuel-saving tips: http://ecomodder.com/forum/EM-hyperm...ecodriving.php #44 on the list states that coasting in neutral (with engine idling) is a better option than coasting in DFCO mode. I was under the impression that DFCO was better than coasting in neutral? Any thoughts? Thanks.

09-17-2012, 08:57 AM	#2
WeeYari View User's Garage Drives: 06 Polar White 5dr, 13 Soul 4u Join Date: Oct 2008 Location: Georgetown, Ontario, Canada Posts: 5,740	It's a juggling act using both DFCO and neutral to achieve best results. If using DFCO slows you down too quickly and you end up needing to apply gas sooner than desired, then you've lost some of the gain. __________________

09-18-2012, 01:59 PM	#8
goliath1812 View User's Garage Drives: 2010 Prius, 2007 Yaris Sedan Join Date: Oct 2009 Location: Ocala Florida Posts: 368	Unless I'm planning on slowing down or coming to a stop, I prefer to neutral coast. It has given me the best MPG results. __________________

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09-17-2012, 01:01 PM	#3
NEexpat Drives: 2009, auto, 4dr LB Join Date: Nov 2010 Location: S.E. New England Posts: 292	If I had a 5 speed I'd be tempted to bump that thing into neutral every chance I got. Since I have the auto I'll stick with DFCO. My car before my Yaris was a 1988 honda Accord LXI 5 speed, and I could squeeze 36 mpg in the summer 32 mpg winter. The gas tank was 15.9 gl. Which put its range out past 550 miles in the summer. I think that car spent more time in neutral than in gear. Of course that was an 80's car, no DFCO.

09-17-2012, 06:49 PM	#4
new-yaris-owner View User's Garage Drives: Toyota Yaris LE HB 2008 Join Date: Apr 2012 Location: Montreal, Qc Posts: 48	if you put it in neutral with automatic transm. would it be ok to change it to Drive while moving ?

09-18-2012, 10:40 AM	#7
matti Drives: 2017 Yaris L (5sp manual) Join Date: Jun 2012 Location: upper midwest Posts: 345	Thanks everyone. I think I'll just continue to use DFCO vs. putting it in neutral while coasting.