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Author Topic: Anyone shifting to neutral on downhill to save gas ? Back to Topics
Vibe03

Veteran Author
Toronto

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Message Posted: Jul 21, 2010 9:12:55 AM

When it is not steep downhill and you don't need to brake the car to slow it down, coasting down around 55 mph at idling gives the engine a rest also save gas. Just not sure if the vacuum and other stuff are operating at normal level
REPLIES (newest first) Post a Reply
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LibertyGuardian
Veteran Author Arizona

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Message Posted: Nov 23, 2014 1:00:40 PM

I've heard people who downhill in neutral are known in the medical field as organ donors.
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redfish67
Champion Author Dallas

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Message Posted: Nov 23, 2014 9:51:30 AM

no
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b899
Champion Author Connecticut

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Message Posted: Nov 23, 2014 9:10:08 AM

no
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b899
Champion Author Connecticut

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Message Posted: Nov 19, 2014 8:39:48 AM

no
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contiki
Champion Author Ontario

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Message Posted: Nov 19, 2014 7:36:52 AM

Never.....
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GasMiser718
Champion Author Detroit

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Message Posted: Nov 16, 2014 8:51:46 AM

No, that would be just going to extremes.
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Tucsonhomes
Champion Author Tucson

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Message Posted: Nov 15, 2014 12:43:18 PM

No
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FrankLee1
All-Star Author Minnesota

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Message Posted: Nov 15, 2014 12:01:18 PM

"Downhill"- what is that? (Flatlander)
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redfish67
Champion Author Dallas

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Message Posted: Nov 15, 2014 10:45:37 AM

no
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b899
Champion Author Connecticut

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Message Posted: Nov 15, 2014 10:43:41 AM

no
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redfish67
Champion Author Dallas

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Message Posted: Nov 14, 2014 9:54:34 AM

very stupid idea
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b899
Champion Author Connecticut

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Message Posted: Nov 14, 2014 7:56:24 AM

no
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PaylessKY
Champion Author Kentucky

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Message Posted: Nov 13, 2014 8:09:04 PM

No
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b899
Champion Author Connecticut

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Message Posted: Nov 12, 2014 8:22:10 AM

no
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nickless
Champion Author PEI

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Message Posted: Nov 12, 2014 5:08:16 AM

No
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JohnCur
Sophomore Author New Jersey

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Message Posted: Nov 12, 2014 12:05:23 AM

No, but shut off at long lights
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Jay4Runner
Champion Author Oakland

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Message Posted: Nov 11, 2014 10:14:52 PM

I have driven two 5-Speed pickups with a manual transmission since 1985. Over time you learn to hypermile just for the sake of keeping things interesting. My 2002 Tacoma gets around 27 mpg in mixed traffic.
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b899
Champion Author Connecticut

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Message Posted: Nov 11, 2014 8:45:42 AM

no
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contiki
Champion Author Ontario

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Message Posted: Nov 9, 2014 8:17:21 AM

Never........
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Jackson126
All-Star Author Virginia

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Message Posted: Nov 9, 2014 5:45:24 AM

no
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Psycho Sid
Champion Author Detroit

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Message Posted: Nov 8, 2014 8:55:00 PM

..*walking in looking around...*

looking for MrGasGuy or DS......
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hoopitup2000
Champion Author Virginia

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Message Posted: Nov 8, 2014 6:01:17 PM

Occasionally
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StArrow68
Champion Author Oakland

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Message Posted: Nov 7, 2014 4:32:00 PM

Redfish, you keep repeating an opinion but don't provide any support. Several have posted how it isn't stupid, except for those without the background to understand what is happening in a manual shift vehicle. Nice thing about opinions, everyone is entitled to them, and others can ignore the ones that don't have much merit.
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redfish67
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Message Posted: Nov 7, 2014 9:50:32 AM

stupid idea
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WEDDY
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Message Posted: Nov 7, 2014 8:52:59 AM

No
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b899
Champion Author Connecticut

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Message Posted: Nov 7, 2014 8:36:14 AM

no
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GasMiser718
Champion Author Detroit

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Message Posted: Nov 4, 2014 11:46:44 AM

No
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hoopitup2000
Champion Author Virginia

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Message Posted: Nov 2, 2014 11:06:52 AM

Why do you think people drive manuals?????????????
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redfish67
Champion Author Dallas

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Message Posted: Nov 2, 2014 10:56:29 AM

stupid idea
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b899
Champion Author Connecticut

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Message Posted: Nov 2, 2014 8:13:30 AM

no
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contiki
Champion Author Ontario

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Message Posted: Oct 31, 2014 7:13:33 AM

Never.....
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twt
Champion Author Virginia Beach

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Message Posted: Oct 31, 2014 3:15:46 AM

Another brainless idea.
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FocusSVT
Champion Author Toronto

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Message Posted: Oct 30, 2014 11:19:26 AM

I had tested on a number of occasions to slow down on a fairly long stretch of downhill coasting in gear vs. coasting on neutral. Result is
that coasting in gear I ended the slope with 35 km speed whereas on neutral it ended with 48 km
This proved to me that going downhill ( of course not too steep ) saves quite a bit of gas as towards the end of the slope I just accelerated from 48 km instead of 35 !
Good topic just has to understand how the car works
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Mikeyy1960
Veteran Author Cape Coral

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Message Posted: Oct 28, 2014 8:06:12 PM

yes
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redfish67
Champion Author Dallas

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Message Posted: Oct 26, 2014 9:40:53 AM

no
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RalphHightower
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Message Posted: Oct 26, 2014 7:57:55 AM

no
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puddy
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Message Posted: Oct 26, 2014 7:57:45 AM

No
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Jackson126
All-Star Author Virginia

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Message Posted: Oct 26, 2014 7:48:49 AM

no
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dontuknowOH
Champion Author Ohio

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Message Posted: Oct 26, 2014 4:24:35 AM

I've noticed that my vehicle, tries to slow down and nearly stop if I release the Go-pedal when in drive. Slow down with engine compression braking, idle cut-off fuel at times, also momentum, by gravity or not such as a down-hill grade or on level terrain.

As my vehicle is slowed, I must brake against the driving motion left...., but also against the idle energy to then keep my vehicle moving along at 6...12 MPH.= Brake wear. then brake lamp energy drain. when stopped.

Sitting still waiting at a red light ECT. with the rear lamps on is a cost to the vehicles electrical system, that energy is converted to the fuel energy used up. Remember all the little power packs in the household plugged in ,but the devices turned off. Well they idle too, by being ahead of the on/off switch in the operation device.

No load is present if off but they still idle(in circuit)partially in operation. Another News tip for saving small amounts of home energy.

Good correct tire pressure will extend momentum for a savings on down-grades even with engine C..braking in effect using free gravity. Led rear lighting is also a energy savings while stopped in drive mode.
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the3gould
Rookie Author Rochester

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Message Posted: Oct 25, 2014 5:08:53 PM

I do if it a big enough hill anan coast to td no traffic is behind me so I coast stop light
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b899
Champion Author Connecticut

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Message Posted: Oct 25, 2014 9:24:36 AM

no
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contiki
Champion Author Ontario

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Message Posted: Oct 23, 2014 7:48:27 AM

Never........
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WEDDY
Champion Author Phoenix

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Message Posted: Oct 21, 2014 9:38:03 AM

No
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Awing1
Champion Author Ontario

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Message Posted: Oct 21, 2014 9:22:30 AM

No, wouldn't make a big difference.
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dontuknowOH
Champion Author Ohio

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Message Posted: Oct 21, 2014 9:06:38 AM

I often decide first; Is this really a hill, mountain, or a simple down-grade, then strait, curved, poor risky road, terrible road conditions or not.

Then traffic quantity nearby, weather conditions, visual data, all good/bad? Their travel speed also. To save fuel, even a small amount, one can't be a complete D... A.. about their driving habits, so they will or should know if everything else is normal stuff operating normally.

Most vehicles travel at 5 mph under, some at the posted limits, some over by 5...10 mph. on down grades, even up-grades as normal with conditions permitting.

The same gravity forces in effect, momentum in effect, often the drivers mind in effect, Well it happens that some minds can't handle the total load at times or make decent decisions for driving, and saving fuel isn't in their abilities either, just guessing! So level is better, naturally!

Level is much better for a lot of things and so are brakes for the unbalanced, whatever....... Stopped can be risky!.......!
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b899
Champion Author Connecticut

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Message Posted: Oct 21, 2014 8:17:24 AM

no
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contiki
Champion Author Ontario

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Message Posted: Oct 21, 2014 7:22:37 AM

no..............
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twt
Champion Author Virginia Beach

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Message Posted: Oct 21, 2014 5:49:13 AM

Another moron.
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StArrow68
Champion Author Oakland

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Message Posted: Oct 20, 2014 10:45:04 PM

Ah, depends on the slope, if coasting in neutral allows you you carry more speed for a longer period vs engine braking then you can back out of the gas earlier and still be safe at the point where you need to brake while going down an offramp. Knowing the capabilities of you vehicle is key, most don't have a clue.
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zippy3231
Champion Author Jacksonville

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Message Posted: Oct 20, 2014 2:47:05 PM

Coasting down hill to save fuels causes more brake loss due to no engine controlling speed! Just my thoughts!
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