MT vs AT----fuel efficiency

[bentjazz]

Hi Yarisworlders,

Generally how many more miles per gallon does a MT get compared to an AT on a Yaris? Just curious....

[Em_]

not much more it's about the same
i have a 2005 echo 1.5 a/t and 2007 yaris 1.5 m/t both are doing the about same mileage

[why?]

driving style makes more of a difference than transmission type. Long gone are the days when autos got 5 or more fewer mpg's than manuals.

The Yaris auto seems to do really well.

[aussie muzza]

I completely agree with what Mr why? said above - driving style has more to do with economy that anything else. My '07 auto sedan regularly returns anywhere from 36 - 42 mpg. I also have a large auto 6 cylinder Australian car (4 litre Ford Falcon Wagon) and on a recent 3000km trip, with 3 people, luggage and other gear it returned just over 30mpg. I was driving for economy. When I tow with the Ford it can go as low as 18mpg. It matters most how you drive. The Yaris is a brilliant car in all respects regardless of auto or manual gears.

[Hershey]

Was up to 45 m.p.g. at about 32 miles after fill up and ended up with 40.2 when arrived home . The mileage dropped when doing city driving thanks to stop lights , stop signs , etc. . This is the '08 base model sedan with the automatic . Conditions were 2 people , winds of 17 m.p.h. , temp of 33 , Blizzak WS70 tires at 34.5 p.s.i. , Shell full synthetic 5w-30 , and winter blend of 87 octane w/E10 . Always stop at 1 click of the gas nozzle . Eco-Meter is set at 94 , so gas mileage may be a bit more .

[bronsin]

Have to disagree here.

First the operating conditions.

Both cars are primarily driven to work 6.5 miles there and 6.5 miles back. City driving.

The 2001 ECHO mt got 40 mpg in summer and 36-38 mpg in winter. Driving it to AC @ 60-65 mph it got 50-53 mpg several times.

The Yaris at gets 34-36 mpg in summer and 28-32 mpg in winter. I am currently experimenting with adding heat to the engine before startup in winter to improve mpg. Some preliminary findings soon...

On its trip to AK last summer in the US going 80-85 mph on interstates the car got 34 mpg. Later on in Canada where the speed limits are typically 62 mph (and I didnt want to test the authorities) the car got 42-44 mpg.

The only fly in the ointment might be the percentage of alcohol in the gas which might be greater now.

Oh and the 5200 miles to AK the engine used regular Walmart oil. On the trip back Mobile 1. There was no difference in mpg.

[baseballfan416]

Driving style is important but 5speeds have a higher potential for peak mpg's. I've gotten as high as 49mpg on a tank, I average 44 in the summer and about 38-40 in the winter (totaling close to 22,000miles of data, spanning a little over a year). There are people on this forum doing low to mid-50's with mt's (check out fully.com for others). Very few auto's do more than 40 in even ideal conditions. Having driven an auto-tragic yaris before, one can't pulse/glide in it, and the gearing isn't conducive for light throttle position because it constantly changes gear to build revs in an anemic power band. Whereas with the 5speed, you can drive cruising speeds at lower revs (particularly in the 35-45mph range where you can be in overdrive and not bog down), as well as coast out of gear to stop lights/downhill (braking and decel technology improve mpg by a mere 10%).

Just my biased 2cents...

[BEEF]

one other thing is the automatic keeps you from going into overdrive until the coolant temp gets high enough (the little light goes off).

I typically shift at 2k and am in 5th gear by 35mph. most of my commute is 50mph.

for people driving shorter trips, this could be a factor.

[bronsin]

Originally Posted by BEEF

one other thing is the automatic keeps you from going into overdrive until the coolant temp gets high enough (the little light goes off).

I typically shift at 2k and am in 5th gear by 35mph. most of my commute is 50mph.

for people driving shorter trips, this could be a factor.

Yep that why we have the mod to allow the at to shift into 4th right away without waiting for the coolant light to go out.

It takes about a mile for my cool light to go out on a 30 degree morning. So if youre drive is ~ 5 miles to work 20% of the time youre potentially in 3rd instead of 4th.

Could be a problem...

[bentjazz]

Thanks for the posts, guys.
The ONLY reason I got the AT is because my mom is older and even though she has a low mileage car, her car is old. Who knows how long it will last. And if her car goes out, she doesn't know how to drive a stick. So, in that event I thought she could share mine. Next car will be a MT, for sure.

[TRDMarty]

I get 41 MPG with my A/T Hatchback

[bentjazz]

I don't know. Fuelly seems to say the MT Yaris does better than the AT Yaris. Woe is me....

[bronsin]

It does. Brake pads going to last longer too of you let off on the gas before you need to brake. And a MT car is more controllable in slippery conditions than an AT one. It slows down faster with your foot off the gas.

[bentjazz]

I'm sorry, I meant to say True Delta shows clearly that the MT does better than the AT in the Yaris in real world reporting.....
At any rate, filled up my AT Yaris today and got 35.91mpg. Not bad. Would have probably been 40mpg with the manual.....
:-(

[why?]

Originally Posted by bronsin

Have to disagree here.

First the operating conditions.

Both cars are primarily driven to work 6.5 miles there and 6.5 miles back. City driving.

The 2001 ECHO mt got 40 mpg in summer and 36-38 mpg in winter. Driving it to AC @ 60-65 mph it got 50-53 mpg several times.

The Yaris at gets 34-36 mpg in summer and 28-32 mpg in winter. I am currently experimenting with adding heat to the engine before startup in winter to improve mpg. Some preliminary findings soon...

On its trip to AK last summer in the US going 80-85 mph on interstates the car got 34 mpg. Later on in Canada where the speed limits are typically 62 mph (and I didnt want to test the authorities) the car got 42-44 mpg.

The only fly in the ointment might be the percentage of alcohol in the gas which might be greater now.

Oh and the 5200 miles to AK the engine used regular Walmart oil. On the trip back Mobile 1. There was no difference in mpg.

you cannot compare an echo to a yaris. They do not compare at all. The Yaris gearing and final drive is different. Toyota decided they wanted the Yaris to have 104 hp, so they sacrificed mpg's. No Yaris does as well as an echo with the same driver/conditions etc.

[bronsin]

Isnt the echos engine and drivetrain identical?

[Em_]

yes it is i don't get the other statement

[FrankM]

i had a 97 tercel i got 40MPG all the time as high as 48 MPG ,it was a stick, my 08 yaris ,auto tranny, the best i have got is 35 MPG when i got the yaris i was sure i would get 40 MPG ore close , , the new Hundi gets 47 MPG , that may be my next car .