Fuel Economy

[TinyGiant]

my spedometer is about 4mph higher than actual speed at about 50mph

[TinyGiant]

if i remember right

[TinyGiant]

it just dawned on me..

when the mpg started going south was when the weather started getting colder.. and i had to run the Defroster for the front windshield alot.. from what i was reading earlier the defroster runs the AC too... thats probably more likely the cause.. whenever i have the heat on its always on the defrost/footwell setting...

[Jem_hadar]

Originally Posted by mkaresh

I've come across many people who estimate MPG based on the fuel gauge. Usually a bad idea.

LOL! Thats too funny!

[Revsson]

Originally Posted by TinyGiant

it just dawned on me..

when the mpg started going south was when the weather started getting colder.. and i had to run the Defroster for the front windshield alot.. from what i was reading earlier the defroster runs the AC too... thats probably more likely the cause.. whenever i have the heat on its always on the defrost/footwell setting...

In my 2009 owner's manual, page 178 states that:
"If A/C is not pressed, the system will blow ambient temperature air or
heated air."
And then later on page 183, it states:
"When the outside air temperature approaches 32 F (0 C)
The air conditioning system may not operate even when A/C is pressed."

Perhaps that has changed from the 2007 or 2008 model year, as my buddy
who has a 2007 said that he thought the A/C came on automatically when
he moved the selector to the feet and windshield defroster setting.

Is that a definitive answer or not.

I have heard that other makes of cars use the A/C when in defrost, but who knows?

[gid]

40 m.p.g. . Trip was many steep hills , 20 m.p.h. winds , 28 > 30 degrees , 2 people , 30% city 70% highway , 1/3 tank of SUNOCO 87 octane along with 2/3s 93 octane containing 10% ethanol , and GOODYEAR Eagle LS tires set at 34 p.s.i.. Using SHELL Full Synthetic 5w-30 and REDLINE MT-90 true synthetic for gear oil . Quite good for these temps and the winterblend of gas .

[hshi]

very poor gas consumption: 22MPG or 400 KM off 42 L
My car: 2008 Yaris Hatchback Auto. total mileage is 10800KM.
I have some strange issue. Everytime when I start the engine and give the gas, the car engine will be revving but the speed stays slow, this may last around 5 mins and when I loose the gas a bit, the rpm will drop sharply and I feel a sudden push somehow. I always drive around city limits and mainly do the city driving. Any recommendations for that?
It kinda drives me insane as the main reason I go for yaris is for the gas consumption but it did not give what I expect.
Thanks

A Puzzled Yaris Owner

Hui

[BailOut]

That is odd indeed, hshi. It sounds as though your air and/or fuel flow is restricted, either by physical blockage or by the ECU. Since your vehicle is still within the warranty period I encourage you to take it to a dealership for repair. If you are more the DIY type here are a few things to try:

1) Check the air filter and reseat/replace it if necessary.
2) In the fuse box in the engine compartment pull the ECU fuse for 15 minutes and then put it back in.
3) Get a fuel injector cleaning gasoline additive and use it.

[marcus]

Originally Posted by hshi

very poor gas consumption: 22MPG or 400 KM off 42 L
My car: 2008 Yaris Hatchback Auto. total mileage is 10800KM.
I have some strange issue. Everytime when I start the engine and give the gas, the car engine will be revving but the speed stays slow, this may last around 5 mins and when I loose the gas a bit, the rpm will drop sharply and I feel a sudden push somehow. I always drive around city limits and mainly do the city driving. Any recommendations for that?
It kinda drives me insane as the main reason I go for yaris is for the gas consumption but it did not give what I expect.
Thanks

A Puzzled Yaris Owner

Hui

i have this feeling that ur not using the right gear when you drive....use D...rather than 1 or 2

[SpaceShot]

Hui,

Do you have a very short commute? Your symptoms sound like the engine warm-up cycle is affecting your shifting. My wife's auto XB retards the shifting while the engine is in the initial warm-up phase. Get out for a highway drive on the weekend for a good 20 minutes or more to make sure the engine gets to full temperature for a good while. If that tank significantly improves your average, consider a higher temp thermostat, engine heater, different oil, or other tricks to warm it up faster.

In Canada you should have gotten the cold weather package Yaris. The dealers shouldn't have had any others. If your not sure, have a mechanic check and evaluate if you are having cold engine problems.

[Yaris#2]

Less than 3000 miles on the care and last tank was 44.8. In town and rural roads. Some 2 lane highway driving mostly 70 degree weather. I can hardly wait for highway driving in the summer!

[Hershey]

we've averaged close to 41 m.p.g. for the last 3 fill ups . These cars are cold blooded , love the heat .

[shastatodd]

I am surprised so many people are reporting such low fuel economy with the Yaris.

I have a 2009, 3 door, well broken in now with 31K on it. On the freeway (74 MPH with A/C on) I typically get in the low 40's... 42 is very common.
In town with hypermileing techniques I have gotten as high as 51, but more typically get around 48 or 49 MPG.

These are the same kinds of numbers we got in our Prius (which my ex-wfe now has). I used to love the Prius, but now... considering the embedded energy in that vehicle, it seems silly to buy one when with conscious driving (what the Prius tries to do for you) you can obtain similar fuel economy. Plus the Yaris was $11.5K & the Prius was over $30K.

[Thai_Dang]

I think everybody who speeds above the speed limit on the highway should stop on the shoulder and look out their window. When I'm going 65 mph on the freeway, I feel like I'm moving in slow motion, but it's scary how fast 65 mph looks when you're completely stopped.

[Hershey]

2008 automatic sedan : 44.56 for calculated mileage . ECO-METER : 44.2 . E.M.. Set at 98 . When set at 99 it's too high . No in betweens .

[STC]

Originally Posted by shastatodd

In town with hypermileing techniques I have gotten as high as 51, but more typically get around 48 or 49 MPG.

These are the same kinds of numbers we got in our Prius (which my ex-wfe now has). I used to love the Prius, but now... considering the embedded energy in that vehicle, it seems silly to buy one when with conscious driving (what the Prius tries to do for you) you can obtain similar fuel economy. Plus the Yaris was $11.5K & the Prius was over $30K.

Using hypermiling techniques, I'm typically getting 48-50 MPG too! My highest so far was 53 MPG. The car is a 2010 with about 5,600 miles.

I'm actually doing about the same average as a Prius... at half the showroom price. That is why it was important for me in purchasing the Yaris. You can squeeze out comparable MPG with pretty much the same 'footprint' as the Prius! Go figure!

It would be nice if all people across the board purchased small vehicles and drove thinking common sense, efficiency, and used hypermiling techniques. Then we would really be 'green' even without having to drive marketed 'hybrid' cars!

Cheers!

[Hershey]

here's our latest mileage when we went to look at a 2011 Fiesta . The 1st pic is M.P.G. average ( 45.3 ) when we arrived at the dealer lot . The second pic is the overall average ( 43.4 ) and miles when got home . The E.M. is set at 98 so reads slightly lower than the calculated fill , when at 99 reads too high . So likely at 44 avg.. Not so bad for a automatic . Still found a slight leak of the head gasket . Tip of finger was wet with fresh oil after cleaning it before the trip . Seems to be slowing down .

[KrazyDawg]

Originally Posted by STC

Using hypermiling techniques, I'm typically getting 48-50 MPG too! My highest so far was 53 MPG. The car is a 2010 with about 5,600 miles.

I'm actually doing about the same average as a Prius... at half the showroom price. That is why it was important for me in purchasing the Yaris. You can squeeze out comparable MPG with pretty much the same 'footprint' as the Prius! Go figure!

If you use the same hypermiling techniques plus the special ones for the Prius e.g. super highway mode which lets you get 70+ MPG on the highway http://www.cleanmpg.com/forums/showt...831#post171831 the Prius would have a much higher MPG than the average driver.