Is it bad to coast in neutral.... - Page 2 - Toyota Yaris Forums

Betrivent · 05-01-2012, 10:39 PM

The fact that is was not a level surface makes this observation completely subjective and inaccurate.

nopk · 05-02-2012, 12:38 AM

Quote:

Originally Posted by Betrivent

The fact that is was not a level surface makes this observation completely subjective and inaccurate.

even if it was level, i still wouldn't consider it

bentjazz · 05-31-2012, 03:56 PM

I've been coasting a lot in neutral lately, and just filled up today. It was the second best fe reading I've received to date on a tank of gas. I think why? is onto something, in that it depends on the situation. Sometimes it's best to go with DFCO, but that's not always possible and in those instances neutral fits the bill just fine. I'll keep experimenting.....

BEEF · 05-31-2012, 05:12 PM

I've noticed that the engine breaking in the yaris is actually a lot more noticeable than in my cavalier. neutral coasting in my cavalier actually yielded me worse mileage than leaving it in gear.

also, pulse and glide is a proven technique. many guys on gassavers have done it (and still do). there are also guys that EOC (engine off coast) which is the most fuel efficient way but questionable when it comes to transmission wear (that is yet another argument to be had).

many guys on gassavers are getting 30+% more than the EPA numbers for their cars and some of the real crazies have exceeded that by leaps and bounds.

caineroad · 05-31-2012, 06:37 PM

is not bad but don't put back to drive while car is moving

why? · 05-31-2012, 10:17 PM

Quote:

Originally Posted by caineroad

is not bad but don't put back to drive while car is moving

yes because shifting is such a horrible thing to do... Oh wait, that is what the car is designed to do.

new-yaris-owner · 06-28-2012, 07:14 PM

I only put it from Drive to Neutral when I see that I will need to stop at a red light.

I instantly see the RPMs going from 2200-2300 to 800... Also easier to brake!

Correct me if I'm wrong to do that way

goliath1812 · 06-28-2012, 10:04 PM

Quote:

Originally Posted by new-yaris-owner

I only put it from Drive to Neutral when I see that I will need to stop at a red light.

I instantly see the RPMs going from 2200-2300 to 800... Also easier to brake!

Correct me if I'm wrong to do that way

if you need to stop, or slow down...leave it in drive and take your foot off the gas pedal.

xhifer · 06-28-2012, 10:22 PM

I've always thought neutral uses more gas.

new-yaris-owner · 07-01-2012, 03:30 PM

Is it hard on the tranny if I put from Neutral to Drive while moving like 20mph ?

tooter · 07-01-2012, 06:27 PM

Quote:

Originally Posted by xhifer

I've always thought neutral uses more gas.

I feel safer coasting with the car in gear.

And coasting in gear takes advantage of the deceleration fuel cut off feature where no fuel is being metered to the engine while coasting in gear as long as the engine rpms remain above idle. Whereas when idling in neutral, fuel is being fed to the engine.

cali yaris · 07-01-2012, 08:14 PM

^ That is correct. Because of DFCO, you'll get better mileage leaving it in gear.

why? · 07-02-2012, 07:24 PM

Quote:

Originally Posted by goliath1812

if you need to stop, or slow down...leave it in drive and take your foot off the gas pedal.

coming to a stop is one the highlights of using DFCO. Slowing down, it depends. If you need to brake, leave it in DFCO, if you can just coast, neutral could be better, unless you are going down a steep enough hill that DFCO does not slow you down at all.

Quote:

Originally Posted by new-yaris-owner

Is it hard on the tranny if I put from Neutral to Drive while moving like 20mph ?

no, it is designed to do that. You have to go through neutral every time you shift.

yarista · 07-04-2012, 10:21 AM

Ok- I see alot of chitter chatter here and a lack of basic automotive technology. Every carmaker that I have ever encountered has placed restrictions on towing an automatic car with the drive wheels spinning. The reason is that auto trans have an oil pump inside that force oils certain bearings. When the auto trans is in neutral, the pump is inop, so no oil to those bearings. If u put ur auto trans in neutral and coast, some bearings are not getting the oil that they should. Now, will short, no oil to certain bearings, coasts cause damage? I don't know and we don't try to findout with my auto trans Yaris. As for a manual trans, the gears spin when the front wheels move and the parts are splash lubricated. Hence, you don't find restrictions for towing manual trans cars with the drive wheels spinning and the trans in neutral. So, I do coast my manual trans Yaris in neutral. Ergo, I cannot believe it good practice to coast an auto trans Yaris in neutral.

bentjazz · 07-06-2012, 02:19 AM

Okay, that does it. No more coasting in neutral for me. The extra 2mpg I get isn't worth possibly screwing up my transmission.....

rningonfumes · 07-06-2012, 03:50 AM

Actually, you never stated which transmission you had. Everyone else debated and compared the pros and cons of manual/Auto.

why? · 07-06-2012, 01:32 PM

Quote:

Originally Posted by yarista

Ok- I see alot of chitter chatter here and a lack of basic automotive technology. Every carmaker that I have ever encountered has placed restrictions on towing an automatic car with the drive wheels spinning. The reason is that auto trans have an oil pump inside that force oils certain bearings. When the auto trans is in neutral, the pump is inop, so no oil to those bearings. If u put ur auto trans in neutral and coast, some bearings are not getting the oil that they should. Now, will short, no oil to certain bearings, coasts cause damage? I don't know and we don't try to findout with my auto trans Yaris. As for a manual trans, the gears spin when the front wheels move and the parts are splash lubricated. Hence, you don't find restrictions for towing manual trans cars with the drive wheels spinning and the trans in neutral. So, I do coast my manual trans Yaris in neutral. Ergo, I cannot believe it good practice to coast an auto trans Yaris in neutral.

I agree with some of that, with a major caveat. Today's oil is so viscous it sticks to everything in an engine, and a minute or two of neutral coasting is not enough to remove the oil.http://www.youtube.com/watch?v=pcYBgod7L_k This is a test of people running a car with no oil for 51 minutes, plus 6 minutes of very high revs. Other types of tests have been done that have concluded the same basic thing.

Not to mention towing is very different from coasting. Towing assumes the vehicle will never be on at all. Coasting does have the vehicle on and everything running, and if the transmission requires said oils, why would the car not add them just for being into neutral? That would make no sense to me.

And while most hyper milers have manual cars, not all of them do. I have not seen any of them blow a transmission from coasting.

mr_miles · 07-07-2012, 02:57 AM

i had to edit this. couldn't resist.

05-31-2012, 05:12 PM	#22
BEEF View User's Garage Drives: 2008 yaris 3d Join Date: Apr 2011 Location: north carolina Posts: 732	I've noticed that the engine breaking in the yaris is actually a lot more noticeable than in my cavalier. neutral coasting in my cavalier actually yielded me worse mileage than leaving it in gear. also, pulse and glide is a proven technique. many guys on gassavers have done it (and still do). there are also guys that EOC (engine off coast) which is the most fuel efficient way but questionable when it comes to transmission wear (that is yet another argument to be had). many guys on gassavers are getting 30+% more than the EPA numbers for their cars and some of the real crazies have exceeded that by leaps and bounds. __________________ Be the change you wish to see in the world -Mahatma Gandhi-

07-01-2012, 08:14 PM	#30
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	^ That is correct. Because of DFCO, you'll get better mileage leaving it in gear. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

07-06-2012, 03:50 AM	#34
rningonfumes Drives: Yaris Sedan 5MT Join Date: Oct 2008 Location: SoCal Posts: 865	Actually, you never stated which transmission you had. Everyone else debated and compared the pros and cons of manual/Auto. __________________

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05-01-2012, 10:39 PM	#19
Betrivent Not quite a noob Drives: e46 325 Join Date: Jul 2009 Location: edmonton Posts: 1,408	The fact that is was not a level surface makes this observation completely subjective and inaccurate.

05-31-2012, 03:56 PM	#21
bentjazz Drives: 2009 Yaris--3dr MT Join Date: Jan 2011 Location: Ohio Posts: 542	I've been coasting a lot in neutral lately, and just filled up today. It was the second best fe reading I've received to date on a tank of gas. I think why? is onto something, in that it depends on the situation. Sometimes it's best to go with DFCO, but that's not always possible and in those instances neutral fits the bill just fine. I'll keep experimenting.....

05-31-2012, 06:37 PM	#23
caineroad Drives: 06 Yaris HB CE Join Date: Aug 2009 Location: Toronto Posts: 501	is not bad but don't put back to drive while car is moving

06-28-2012, 07:14 PM	#25
new-yaris-owner View User's Garage Drives: Toyota Yaris LE HB 2008 Join Date: Apr 2012 Location: Montreal, Qc Posts: 48	I only put it from Drive to Neutral when I see that I will need to stop at a red light. I instantly see the RPMs going from 2200-2300 to 800... Also easier to brake! Correct me if I'm wrong to do that way

06-28-2012, 10:22 PM	#27
xhifer Drives: none Join Date: Feb 2012 Location: bay area Posts: 46	I've always thought neutral uses more gas.

07-01-2012, 03:30 PM	#28
new-yaris-owner View User's Garage Drives: Toyota Yaris LE HB 2008 Join Date: Apr 2012 Location: Montreal, Qc Posts: 48	Is it hard on the tranny if I put from Neutral to Drive while moving like 20mph ?

07-04-2012, 10:21 AM	#32
yarista Drives: 07 Yaris 3dr, 09 Yaris 4dr Join Date: Sep 2011 Location: Pennsylvania, USA Posts: 17	Ok- I see alot of chitter chatter here and a lack of basic automotive technology. Every carmaker that I have ever encountered has placed restrictions on towing an automatic car with the drive wheels spinning. The reason is that auto trans have an oil pump inside that force oils certain bearings. When the auto trans is in neutral, the pump is inop, so no oil to those bearings. If u put ur auto trans in neutral and coast, some bearings are not getting the oil that they should. Now, will short, no oil to certain bearings, coasts cause damage? I don't know and we don't try to findout with my auto trans Yaris. As for a manual trans, the gears spin when the front wheels move and the parts are splash lubricated. Hence, you don't find restrictions for towing manual trans cars with the drive wheels spinning and the trans in neutral. So, I do coast my manual trans Yaris in neutral. Ergo, I cannot believe it good practice to coast an auto trans Yaris in neutral.

07-06-2012, 02:19 AM	#33
bentjazz Drives: 2009 Yaris--3dr MT Join Date: Jan 2011 Location: Ohio Posts: 542	Okay, that does it. No more coasting in neutral for me. The extra 2mpg I get isn't worth possibly screwing up my transmission.....