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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
REPLIES (newest first) Post a Reply
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FocusSVT
Champion Author Toronto

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Message Posted: Jul 29, 2014 3:51:58 PM

dontuknowOH

Great lines !
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 29, 2014 9:11:39 AM

I once asked a Dentist Why does a car have a transmission and a motorized mini bike doesn't, both can go above the speed limits in town. he said Why must I drill into your tooth and you must pay me for that?

It's about saving something to be used later on again, and again, and again! Mini bikes wear out Quickly, Quicker when adults ride them!

Motto; Saving fuel is easier going up or down hill ask your Dentist first!
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jay93LA
Champion Author New Orleans

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Message Posted: Jul 29, 2014 8:54:44 AM

no
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twt
Champion Author Virginia Beach

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Message Posted: Jul 29, 2014 5:13:54 AM

Hair brained idea.
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BCNU
Champion Author British Columbia

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Message Posted: Jul 29, 2014 3:28:54 AM

no
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 29, 2014 12:49:15 AM

With automatics, it takes a very good driver's memory recall to often get it back into drive mode, led astray by watching the speedometer and multi tasking the windshield view ahead/finding the brake pedal instead of that adjustable temp. footrest.

I love those handy side mirror adjusters that work on the move just as well as when stopped also no fumbling in the dark, every button almost is lighted for ease of touch now-days.

The extra fuel savings I apply toward weekend fair weather county yard-sales, large ones!
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Awing1
All-Star Author Ontario

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Message Posted: Jul 28, 2014 11:02:54 AM

No.
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OilerFan
Champion Author Tulsa

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Message Posted: Jul 28, 2014 7:40:26 AM

I do it all the time, but I drive a manual transmission, so it's not that big a deal.
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hoopitup2000
Champion Author Virginia

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Message Posted: Jul 28, 2014 6:30:09 AM

Rarely . . . .
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RalphHightower
Champion Author South Carolina

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Message Posted: Jul 28, 2014 5:52:28 AM

no
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Jay4Runner
Champion Author Oakland

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Message Posted: Jul 27, 2014 2:34:30 PM

I used to coast a lot but my commute has changed where it would not make a difference.
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Jetta_Pilot
Champion Author Toronto

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Message Posted: Jul 27, 2014 1:30:56 PM

Dumbest thing I ever heard of in an automatic tranny car !!
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 27, 2014 9:58:33 AM

DEFCO tune-up may be needed, when running oversize tires, check....even on level ground with non windy travel. Drastic total wheel size diameters may change your drive axle torque spec. and speedometer readings/motion dynamics. Barometric sensors seldom act up if not in the mountains or at sea level(power levels) will vary sometimes (towing). Tire pressure very important check all tires. HAGD!
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contiki
Champion Author Ontario

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Message Posted: Jul 27, 2014 7:29:17 AM

Never.....
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RalphHightower
Champion Author South Carolina

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Message Posted: Jul 27, 2014 6:50:26 AM

no
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Awing1
All-Star Author Ontario

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Message Posted: Jul 25, 2014 10:33:16 PM

No.
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 25, 2014 10:21:58 PM

No hills ,but I did a neutral coast making 5 green lights at an even steady speed nearly 2.5 mile in the econo vehicle today. Traffic for a change was a Charm!
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dassfg
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Message Posted: Jul 25, 2014 8:19:18 AM

Never
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b899
Champion Author Connecticut

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Message Posted: Jul 25, 2014 8:01:37 AM

no
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jl1rp
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Message Posted: Jul 23, 2014 12:37:08 AM

no
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redfish67
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Message Posted: Jul 20, 2014 11:39:28 AM

no
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Awing1
All-Star Author Ontario

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Message Posted: Jul 20, 2014 10:11:32 AM

No,
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b899
Champion Author Connecticut

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Message Posted: Jul 20, 2014 9:39:04 AM

no
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contiki
Champion Author Ontario

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Message Posted: Jul 20, 2014 7:07:06 AM

Never.....
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poetdog73
Champion Author Toledo

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Message Posted: Jul 19, 2014 10:02:20 PM

too busy driving
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FocusSVT
Champion Author Toronto

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Message Posted: Jul 19, 2014 5:16:33 PM

Practiced this for over 2 years now and can see the savings. My fuel
consumption went down a full liter per 100 km and the car is running ever
smooth. Over 11 years and over 1/4 million km. I use synthetic oil
religiously and never over 8000 km for oil change
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contiki
Champion Author Ontario

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Message Posted: Jul 19, 2014 7:40:35 AM

Never...........
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b899
Champion Author Connecticut

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Message Posted: Jul 19, 2014 6:49:12 AM

No
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b899
Champion Author Connecticut

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Message Posted: Jul 17, 2014 8:45:43 AM

no
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PaylessKY
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Message Posted: Jul 15, 2014 11:09:53 AM

No
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contiki
Champion Author Ontario

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Message Posted: Jul 15, 2014 7:18:26 AM

Never........
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cv
Champion Author Raleigh

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Message Posted: Jul 14, 2014 5:53:04 AM

No need for the small savings in my case.
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ace12012
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Message Posted: Jul 13, 2014 4:19:40 PM

no.
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redfish67
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Message Posted: Jul 13, 2014 9:32:30 AM

no
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contiki
Champion Author Ontario

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Message Posted: Jul 13, 2014 8:35:11 AM

never............
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 12, 2014 10:46:20 PM

After 60 years of driving, I can only say that I know what works for me in a personal way related to my driving career. Safety in the first thing in mind, keeping tension to a decent level is important as a driver, also being alert for the unknown which depends on ones 5 most important blessed senses/reflexes/coordination.

Saving fuel is important but not as a risk to any of the above mentioned decisions by any driver.

I find that anytime a driver releases the go pedal the vehicle will attempt to slow nearly to a stop, nearly by say 6-12 MPH. when in gear mode(Drive)with engine running/idling. Most final gearing drivetrains are near 3:1 ratio or thereabouts.

The final gearing is subject to driveline resistive forces(internal friction) therefore no total free wheeling and the that OEM system had an advantage of 3 to slow or reduce momentum to a near stop with no brake application, anytime the go pedal is released/cruise off.

The topic if read carefully states the conditions for a possible fuel savings with regard to a somewhat coast event in neutral at engine running at idle or near that rpm speed when encountering a down grade. I took that to mean not a mountain, a winding decent steep decent, dangerous road with no guard rails/ravines and many caution signs, and gobs of other warnings
present.

Again knowing your daily driven vehicles details/design/operations is a good thing to help any beneficial advantages for saving fuel and not being a hazard to anyone by habit. Happy Motoring!
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dassfg
Champion Author Fort Worth

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Message Posted: Jul 12, 2014 8:13:12 AM

No
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contiki
Champion Author Ontario

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Message Posted: Jul 12, 2014 7:57:23 AM

Never......
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Thumper52
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Message Posted: Jul 12, 2014 5:26:28 AM

No
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BCNU
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Message Posted: Jul 12, 2014 5:00:25 AM

If I have got to resort to that, guess I'll have to sell the car.
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dontuknowOH
Champion Author Ohio

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Message Posted: Jul 12, 2014 12:39:48 AM

Mine sort of rests in the N mode no heavy torque going in or out, like gliding on my bike, body resting, every things corollary/cooler.

Minimum fuel for an older type vehicle per ground coverage(mileage),shows at the refuel pump, depends monthly on the terrain covered.
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46chief
Champion Author Indiana

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Message Posted: Jul 11, 2014 1:55:54 PM

I would like to but isn't that hard on today's automatic transmissions?
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jslessor
Rookie Author Ontario

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Message Posted: Jul 11, 2014 11:37:42 AM

Apparently this was a thing in the 70s
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Awing1
All-Star Author Ontario

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Message Posted: Jul 11, 2014 8:22:14 AM

No, I don't think there will be noticeable gas saving.
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b899
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Message Posted: Jul 11, 2014 8:18:28 AM

no
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contiki
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Message Posted: Jul 10, 2014 7:08:37 AM

Never.........
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rmw10rpw
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Message Posted: Jul 8, 2014 9:31:53 AM

no
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b899
Champion Author Connecticut

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Message Posted: Jul 8, 2014 9:10:52 AM

no
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contiki
Champion Author Ontario

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Message Posted: Jul 6, 2014 8:17:12 AM

No....never.....
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puddy
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Message Posted: Jul 6, 2014 7:26:03 AM

no
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