Not Logged In Log In   Sign Up   Points Leaders
Follow Us    1:48 AM

Message Forum - Read Message

Category: Fuel Economy > Topics Add to favorite topics   Post new topicPost New Topic
Author Topic: Does a manual transmission save more gas? Back to Topics
binhboy

Rookie Author
Orange County

Posts:1
Points:120
Joined:Oct 2013
Message Posted: Oct 14, 2013 7:34:29 PM

I was wondering if a manual transmission saves more gas than an automatic. Or does it just depend on the driver ?
REPLIES (newest first) Post a Reply
Profile Pic
GasMiser718
Champion Author Detroit

Posts:1,840
Points:177,780
Joined:Apr 2006
Message Posted: Nov 16, 2014 8:20:17 AM

Yes I think they do, but I prefer an automatic now.
Profile Pic
luvmyrv
Champion Author Winnipeg

Posts:1,026
Points:519,410
Joined:Dec 2012
Message Posted: Nov 13, 2014 2:06:33 PM

They used to claim it did, but not sure anymore...even back then the difference was only about 1 mpg.
Profile Pic
twt
Champion Author Virginia Beach

Posts:13,113
Points:1,636,085
Joined:Mar 2005
Message Posted: Nov 13, 2014 5:24:19 AM

Not sure, any more.
Profile Pic
eyegotgas2
Champion Author British Columbia

Posts:4,238
Points:903,455
Joined:Sep 2011
Message Posted: Nov 13, 2014 5:03:24 AM

I read an article here that said they no longer do. Automatic transmissions have become very fuel efficient
Profile Pic
pinbuster2005
Champion Author New Hampshire

Posts:5,491
Points:1,672,345
Joined:Oct 2005
Message Posted: Nov 13, 2014 2:55:17 AM

hoopitup2000 - "Personal experience. No pixie dust here, just fact."

Exactly, As I said in an earlier post. I had two identical trucks myself except the model year. My 2001 F-150 was a 5-spd std while my 2000 F-150 was an automatic. Both had a 4.2 liter v-6 engine and the same rear end in them and were both long body trucks. I got 20.5 mpg on average with the standard while I only got 18.3 mpg with the automatic driving both the same way over the same roads. On a long trip I could pull 24 mpg out of the standard while I could barely break 20 mpg with the automatic. By the way with the 2001 with the standard I was still getting that mileage after it had 230K + miles on it and the 2000 with the automatic only had 125k on it.
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,581
Points:502,875
Joined:Jul 2013
Message Posted: Nov 12, 2014 10:18:05 AM

"Not on the newer models"

According to the EPA, yes. In the real world, not necessarily.

Please don't tell me you actually believe the goverment can do something right.
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,581
Points:502,875
Joined:Jul 2013
Message Posted: Nov 12, 2014 10:16:13 AM

"I smile when reading the Internet expert mechanics assurances of spectacular mpg results from a stick shift verses autos and pause to wonder where all that expertise came from."

Personal experience. No pixie dust here, just fact.

Profile Pic
weddy11
Champion Author Phoenix

Posts:4,589
Points:1,084,125
Joined:Dec 2011
Message Posted: Nov 12, 2014 8:47:39 AM

Not on the newer models.
Profile Pic
LibertyGuardian
Veteran Author Arizona

Posts:316
Points:43,535
Joined:Oct 2014
Message Posted: Nov 12, 2014 8:36:34 AM

I smile when reading the Internet expert mechanics assurances of spectacular mpg results from a stick shift verses autos and pause to wonder where all that expertise came from.



[Edited by: LibertyGuardian at 11/12/2014 8:39:18 AM EST]
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,581
Points:502,875
Joined:Jul 2013
Message Posted: Nov 12, 2014 7:46:08 AM

Absolutley, not even close.
Profile Pic
GasMiser718
Champion Author Detroit

Posts:1,840
Points:177,780
Joined:Apr 2006
Message Posted: Nov 12, 2014 1:31:49 AM

Yesnthey do...
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,581
Points:502,875
Joined:Jul 2013
Message Posted: Nov 6, 2014 6:35:44 AM

Yes they can by a huge margin if driven for economy.
Profile Pic
GrumpyCat
Champion Author Alabama

Posts:5,553
Points:1,306,230
Joined:Jun 2009
Message Posted: Nov 5, 2014 10:01:22 PM

It depends on a lot of things. Most people are idiots and can not properly shift a manual without over revving, lugging, or rough shifts. Modern automatics generally equal the best of manuals and often beat manuals.
Profile Pic
selvan777
Rookie Author Sacramento

Posts:28
Points:8,700
Joined:Feb 2013
Message Posted: Nov 5, 2014 5:01:41 PM

Yes but only if the driver has that goal in mind.
Profile Pic
GasMiser718
Champion Author Detroit

Posts:1,840
Points:177,780
Joined:Apr 2006
Message Posted: Nov 5, 2014 4:43:38 PM

Yes, but I am past that...
Profile Pic
ChiefNolarama
Sophomore Author Nebraska

Posts:180
Points:584,225
Joined:Dec 2012
Message Posted: Nov 4, 2014 9:28:16 AM

Manual usally will yield better mpg vs and automatic, but the biggest variable is how the driver uses the vehicle.
Profile Pic
OilerFan
Champion Author Tulsa

Posts:16,519
Points:2,971,365
Joined:Aug 2005
Message Posted: Nov 4, 2014 7:16:27 AM

definitely. An automatic transmission, any of them, cannot anticipate the road and make adjustments. A manual transmission, driven by a human being, can.
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,581
Points:502,875
Joined:Jul 2013
Message Posted: Nov 4, 2014 6:34:44 AM

Autos are boring & less inefficient except on flat highway cruises.
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,581
Points:502,875
Joined:Jul 2013
Message Posted: Nov 3, 2014 6:22:18 AM

Let me elaborate . . . . .

YES, with proper driver driving skills, one can do MUCH better with a manual. Especially in city driving. Highway driving, not so much, until you throw in some hills.
Profile Pic
forestghost07
Champion Author Miami

Posts:1,112
Points:18,210
Joined:Apr 2013
Message Posted: Nov 2, 2014 11:23:40 PM

"Depends on how you drive."

I agree. All 3 of my vehicles are manual, and give decent MPG when driven conservatively and proper minimum RPM shift points are observed. e.g. 1999 Chevy Blazer 4 x 4, 5 sp., 4.3L V6 - 23 MPG highway (steady 70 MPH)

Rev it high and drive it agressively, it's a fuel monster, low as 11 MPG.
Profile Pic
pinbuster2005
Champion Author New Hampshire

Posts:5,491
Points:1,672,345
Joined:Oct 2005
Message Posted: Nov 2, 2014 1:23:32 PM

bartendlisa - "As several posters have noted, a manual has the potential to be more fuel efficient if driven properly. I have driven an automatic truck identical to my manual, except for 1 model year, and have found mine to get 2 mpg better overall. Same axle ratio, wheel size, etc."

I had two identical trucks myself except the model year. My 2001 F-150 was a 5-spd std while my 2000 F-150 was an automatic. Both had a 4.2 liter v-6 engine and the same rear end in them and were both long body trucks. I got 20.5 mpg on average with the standard while I only got 18.3 mpg with the automatic driving both the same way over the same roads. On a long trip I could pull 24 mpg out of the standard while I could barely break 20 mpg with the automatic.
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,581
Points:502,875
Joined:Jul 2013
Message Posted: Nov 2, 2014 11:10:06 AM

Yes, with proper driver driving skills, one can do much better with a manual.
Profile Pic
GasMiser718
Champion Author Detroit

Posts:1,840
Points:177,780
Joined:Apr 2006
Message Posted: Nov 2, 2014 10:49:00 AM

I only drove a manual transmission car when the vehicke were high performance. So I never saved gas while driving them.
Profile Pic
Awing1
Champion Author Ontario

Posts:1,252
Points:344,595
Joined:Aug 2013
Message Posted: Oct 31, 2014 10:06:40 AM

I haven't really compared both because I have always used Auto transmission except my military period when I was young, but I'm feeling manual transmission would be more efficient on gas mileage. Is this old time thinking?
Profile Pic
dontuknowOH
Champion Author Ohio

Posts:3,632
Points:62,665
Joined:Aug 2009
Message Posted: Oct 31, 2014 9:35:57 AM

traffic cop >>> "Times have changed" <<< I agree with His opinion on the automatic trannies on average doing better than the STD. The very experienced driver may on occasion knowing His vehicle much more than the ordinary driver is an exception.

Remember the older carburetor vehicles had a so called "pump shot" incorporated to enable reasonable performance. Each time the G..pedal was pressed as when shifting a manual through each gear change, there was a squirt stream of raw fuel shot into the carb throat then to be atomize into a mist. This process prevented lean-outs at all speeds, when shifting manuals. That was a hinder to Std. shifting fuel economy.

Back then the older automatics in comparison only needed one pump shot instead of three to four used operating a manual. The bigger loss in fuel mileage was the slippage in the torque converter at various speeds/clumsy shift points in relation to engine power, and no O-Drive gearing ratios.

Todays EFI/ECM/Electric/Monitored/engine tuning combined with Electric timing/variable cam timing/multi gearing changes and multi valve OHC with reduced valve train, V/S the older >>> (pushrod/rocker design)older engines,= "change" Less weight, more aluminum in use, but people want more luxuries/devices in the vehicles, very competitive market, mileage ~ ~ ~ I'm for the automatic TWD.
Profile Pic
badbobKY
All-Star Author Lexington

Posts:815
Points:20,945
Joined:Aug 2013
Message Posted: Oct 30, 2014 9:23:02 AM

yes
Profile Pic
HideMKE
Champion Author Milwaukee

Posts:2,690
Points:647,125
Joined:Mar 2012
Message Posted: Oct 30, 2014 9:11:35 AM

yes if you know your car...
Profile Pic
LibertyGuardian
Veteran Author Arizona

Posts:316
Points:43,535
Joined:Oct 2014
Message Posted: Oct 30, 2014 8:13:23 AM

Myth...Today's modern technology in automatic transmissions and monitoring equipment on board are generally superior to manual shifting in nearly every aspect.
Drivers using manual transmissions tend to view themselves as a "professional" road racing hero and more often than not abuses the vehicle's best economic efficiency by shifting late, over revving the engine and exceeding the best shift points for maximizing fuel economy.
A manual trany in the hands of the average driver today, seems to immediately turn just about every one of them into a Dale Jr, Tony Stewart or Jimmie Johnson
Profile Pic
Jackson126
All-Star Author Virginia

Posts:867
Points:294,455
Joined:May 2014
Message Posted: Oct 30, 2014 7:28:09 AM

no
Profile Pic
ballotmaster
Champion Author Seattle

Posts:3,352
Points:1,457,075
Joined:Aug 2007
Message Posted: Oct 27, 2014 1:05:23 AM

No
Profile Pic
weddy11
Champion Author Phoenix

Posts:4,589
Points:1,084,125
Joined:Dec 2011
Message Posted: Oct 26, 2014 9:54:01 AM

Not on the newer cars.
Profile Pic
krazkar
Champion Author Calgary

Posts:3,048
Points:928,705
Joined:May 2012
Message Posted: Oct 25, 2014 10:34:35 PM

Back in the day they did
Profile Pic
GLM4205
Champion Author Toledo

Posts:6,496
Points:1,377,210
Joined:Dec 2010
Message Posted: Oct 25, 2014 5:43:04 PM

Yes
Profile Pic
twt
Champion Author Virginia Beach

Posts:13,113
Points:1,636,085
Joined:Mar 2005
Message Posted: Oct 25, 2014 5:09:04 AM

Manual shift, gives better mileage.
Profile Pic
Mikeyy1960
Veteran Author Cape Coral

Posts:271
Points:143,145
Joined:Aug 2014
Message Posted: Oct 24, 2014 7:54:36 PM

depend on driver and your commute...
Profile Pic
fumanaz
Sophomore Author Arizona

Posts:157
Points:567,765
Joined:Feb 2012
Message Posted: Jan 20, 2014 9:02:24 PM

No
Profile Pic
lyanMI
Champion Author Detroit

Posts:1,724
Points:719,810
Joined:May 2012
Message Posted: Jan 20, 2014 8:06:09 PM

Automatics are becoming more fuel efficient these days
Profile Pic
WEDDY
Champion Author Phoenix

Posts:6,146
Points:1,688,645
Joined:Oct 2009
Message Posted: Jan 19, 2014 11:00:52 AM

Depends on the car and of course the driver. Some cars show better EPA with manual, and others show better with automatic.
Profile Pic
Boyrr
Champion Author Allentown

Posts:17,524
Points:3,802,855
Joined:May 2004
Message Posted: Jan 19, 2014 10:04:58 AM

Not with the current machines
Profile Pic
gvan
Champion Author Chicago

Posts:25,514
Points:3,490,265
Joined:Dec 2004
Message Posted: Jan 18, 2014 12:47:13 PM

"Coasting in neutral can waste gas because the ECM sends gas to the engine
to maintain idle but shuts down fuel during engine braking action."

And to back that up:

January 15, 2014
Shifting into neutral and coasting does not save gas. When the vehicle is coasting with the transmission in gear, the computers turn off the fuel injectors until the engine slows to near idle speed. The engine is still turning over but using no gasoline. “Turning off the fuel injectors means the drivetrain is turning the engine rather than the engine turning the drivetrain,” says RockAuto.com’s Taylor. “This actually helps slow the vehicle and slightly reduces brake pad wear when coming to a stop.”
Profile Pic
traffic cop
Champion Author Boston

Posts:3,154
Points:1,136,950
Joined:Oct 2004
Message Posted: Jan 14, 2014 1:34:47 PM

Times have changed. A computerized six-speed automatic is going to outperform a manual four- or five- speed manual box. If you're considering a purchase with a manual, consider the reduced market you'll have for re-sale when you're ready to buy again.

Occasionally there are those "stupid crook stories," where some jerk tries to steal or hijack a car, only to be thwarted by a manual box he doesn't know how to operate.
Profile Pic
magpie2013
Champion Author Milwaukee

Posts:4,217
Points:142,995
Joined:Apr 2013
Message Posted: Jan 12, 2014 6:26:09 PM

It did way back when, but now things have changed including the gas, so no I don't believe so.
Profile Pic
rick_evans
Champion Author Boston

Posts:6,620
Points:1,679,030
Joined:Aug 2005
Message Posted: Jan 8, 2014 7:39:52 AM

Sal30 --"With an auto, it hurts the car to shift to neutral during motion, but with a manual, it's safe for the car. "

1. Coasting in neutral is less safe for car control especially when on a
downgrade because.

2. Coasting in neutral can waste gas because the ECM sends gas to the engine
to maintain idle but shuts down fuel during engine braking action.
Profile Pic
MertieMan
Champion Author Lexington

Posts:17,559
Points:3,551,160
Joined:May 2005
Message Posted: Jan 8, 2014 5:03:23 AM

It most definitely depends on the driver and his technique in using the manual transmission. You cannot skip gears and effectively get good gas mileage.
Profile Pic
Karisholman
Veteran Author Nevada

Posts:471
Points:598,385
Joined:Oct 2012
Message Posted: Jan 8, 2014 2:36:35 AM

I think it definitely depends on the driver.
Profile Pic
GrumpyCat
Champion Author Alabama

Posts:5,553
Points:1,306,230
Joined:Jun 2009
Message Posted: Jan 7, 2014 9:08:29 PM

This is as goofy of a question as to whether synthetic motor oil is magic.

Most any manual transmission will yield better MPG than a caveman stupid classical 3-speed Detroit-based slushbox. But thats not found on modern cars. Even then a big V8 often got better MPG than the same vehicle/engine with a manual. But what many don't tell you is the manual was geared for acceleration not economy.

The best answer to your question is to consult the EPA ratings.

As for synthetic vs refined, once again consult performance tests, not marking nomenclature.
Profile Pic
dgsteven
Champion Author Los Angeles

Posts:3,570
Points:861,975
Joined:Oct 2012
Message Posted: Jan 7, 2014 7:30:10 AM

yes
Profile Pic
hoopitup2000
Champion Author Virginia

Posts:1,581
Points:502,875
Joined:Jul 2013
Message Posted: Jan 7, 2014 7:23:27 AM

"Not that much difference these days mechanics tell me."

I would be wary of these so called "mechanics" when they tell you your "muffler bearings" need to be replaced.

You know we are in trouble when mechanics start to believe the EPA.
Profile Pic
cv
Champion Author Raleigh

Posts:17,981
Points:3,920,930
Joined:Oct 2003
Message Posted: Jan 7, 2014 6:25:07 AM

Not that much difference these days mechanics tell me.
Profile Pic
dontuknowOH
Champion Author Ohio

Posts:3,632
Points:62,665
Joined:Aug 2009
Message Posted: Jan 4, 2014 4:03:11 AM

My bet is on the skilled driver combined with a familiar std. tranny vehicle with his mind set to save fuel as a priority driving episode. The average driver with average skills/driving habits should do better with the automatic when both vehicles are otherwise equal in nature.

Convenience comes with an extra mechanical design cost(more complex apparatus) = nice & lazy to an extent/degree = affordable/satisfied! Smile!
Post a reply Back to Topics