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

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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
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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
Sophomore Author Cape Coral

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

yes
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redfish67
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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
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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
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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
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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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redfish67
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Message Posted: Oct 20, 2014 1:39:43 PM

no
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ChiefNolarama
Rookie Author Nebraska

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Message Posted: Oct 20, 2014 10:13:15 AM

Coast in my manual as much as possible.
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WEDDY
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Message Posted: Oct 20, 2014 9:49:00 AM

No
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b899
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Message Posted: Oct 20, 2014 8:31:21 AM

no
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redfish67
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Message Posted: Oct 18, 2014 10:12:34 AM

no
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Birkut
Veteran Author Quebec City

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Message Posted: Oct 18, 2014 6:27:33 AM

It is not the right thing to do, just let the car go.
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Jackson126
All-Star Author Virginia

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Message Posted: Oct 17, 2014 9:11:10 AM

no
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b899
Champion Author Connecticut

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Message Posted: Oct 17, 2014 9:06:26 AM

no
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contiki
Champion Author Ontario

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Message Posted: Oct 17, 2014 6:56:46 AM

Never.....
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weddy11
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Message Posted: Oct 16, 2014 9:41:43 AM

No
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dontuknowOH
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Message Posted: Oct 16, 2014 8:54:25 AM

No hills lately, catch a few slight down-grades where momentum stays enhanced for an extended distance if disengaged, staying also at zoned speeds I gain mileage savings by staying off the fuel faucet(Go Pedal).

Correct Tire Pressure is the main essential to benefit on a momentum advantage. wind direction can help/hinder a savings, any exterior baggage kills momentum off(poor aerodynamics), that I seldom have while driving.

I never give up Engine compressing braking on a so called hill, that would cause extra brake pad wear by riding the brakes to maintain safe travel speed (silly),= more waste

Engine braking can cancel alternator load costs, some coolant fan costs, things like that when the acell.. pedal is released often, depending on the length of the interval time of motion/momentum. Geesh!...
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hoopitup2000
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Message Posted: Oct 16, 2014 6:32:11 AM

That's why I drive a manual.
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DaddyD302
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Message Posted: Oct 16, 2014 2:50:03 AM

no
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redfish67
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Message Posted: Oct 15, 2014 10:06:32 AM

no
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hoopitup2000
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Message Posted: Oct 15, 2014 6:41:38 AM

Of course, it's a manual!!
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randy3116
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Message Posted: Oct 15, 2014 5:39:29 AM

sometimes
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WilhamClouse
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Message Posted: Oct 15, 2014 1:00:33 AM

no
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PaylessKY
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Message Posted: Oct 14, 2014 1:51:16 PM

Shifting an automatic while moving is not good unless its an emergency.
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Awing1
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Message Posted: Oct 14, 2014 12:24:26 PM

No
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dontuknowOH
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Message Posted: Oct 14, 2014 10:47:45 AM

I have more problems operating an umbrella.....They just aren't made for bicycles, tractors maybe!
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WEDDY
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Message Posted: Oct 14, 2014 9:38:45 AM

No
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Tucsonhomes
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Message Posted: Oct 13, 2014 2:17:04 PM

Nope
Cruise control
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b899
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Message Posted: Oct 13, 2014 8:39:33 AM

no
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cujo1977
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Message Posted: Oct 13, 2014 7:18:48 AM

N
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StArrow68
Champion Author Oakland

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Message Posted: Oct 13, 2014 3:54:21 AM

Is giving the car a rev in your driveway, hard on the transmission? So let's see, the engine is running, the car is in neutral, and except that the wheels are turning, things are pretty much the same as sitting in the driveway at idle. What is hard on the Tranny? Common sense is sadly lacking.
Btw, in a manual car putting in the clutch and shifting to neutral disengages the engine from the drive train. All that is required to get back in gear is to rev match when you put the car back in gear. If you don't understand that statement, don't try it.



[Edited by: StArrow68 at 10/13/2014 3:59:18 AM EST]
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twt
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Message Posted: Oct 13, 2014 3:29:54 AM

That, is hard on your transmission.
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krazkar
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Message Posted: Oct 12, 2014 11:46:41 PM

no
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dontuknowOH
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Message Posted: Oct 12, 2014 10:28:05 PM

Since my vehicles were designed to motivate either up-grade and down-grade, I then have no problems. I of course must drive those vehicles, when in motion, try to save fuel when possible, glance at the MPG indicator for a tell-tale of wind affecting my mileage maybe.

Some times I turn over a partial driving effort to the cruise control, depending on the traffic load and weather. All the rest of the operating stuff stays normal except the radio, needing a change and an occasional refueling. I did polish my headlamps back to luster on the two 14 year old rides, replaced one brake lamp bulb, aired tires a bit(daily temps have dropped), and that will save some fuel.

No hills lately but a few gravity de-cells in order to catch those going-green lights (in my favor). I'm ready for the $2.80 gal. prices! Excited!
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proudvet1
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Message Posted: Oct 12, 2014 10:07:10 PM

no
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stoihor
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Message Posted: Oct 12, 2014 7:05:51 PM

no.
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