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Toyota Yaris Real-World MPG

472 messages,  Last post on Oct 23, 2009 at 11:40 AM

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What is this discussion about? Toyota Yaris, Fuel Efficiency (MPG), Hatchback


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#235 of 472
Re: coasting... [jkandell] by nippononly
Mar 02, 2007 (12:48 pm)
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Replying to: jkandell (Mar 02, 2007 9:23 am)

Yes, all manual transmissions have synchros on every forward gear, but you can sure take it easier on your synchros if you do what I described. And certainly if the speed of the engine is very different from the speed of the gear you are trying to engage, you may get the occasional "crunch" if you don't rev-match, depending on how good your car's synchros are.
 
And no, that's not double-clutching.
#236 of 472
Re: coasting techniques for better mpg [jkandell] by nippononly
Mar 02, 2007 (12:51 pm)
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Replying to: jkandell (Mar 02, 2007 8:45 am)

"To push things further, you can also sometimes use engine braking (which uses no fuel) in situations where you need to decelerate, rather than coasting (which uses a small amount of fuel to maintain idle). Not sure if I'm right about that last one, though, just what it seems to me."
 
Any time your engine is running, it is using gas. It can't run without it. So coasting in gear (with a manual) using the engine to brake uses roughly the same amount of fuel as just allowing it to idle. But engine braking will increase the life of your brake pads and helps the piston rings seat as well.
#237 of 472
Re: coasting... [nippononly] by jkandell
Mar 07, 2007 (4:51 pm)
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Replying to: nippononly (Mar 02, 2007 12:48 pm)

"Yes, all manual transmissions have synchros on every forward gear, but you can sure take it easier on your synchros if you do what I described."
 
One way to match the revs from neutral to a gear is to blip the throttle a bit before shifting. I don't like that because it's wasted gas--which is what I'm in neutral trying to avoid. So what I've been doing most of the time is shifting into a slightly higher gear than is recommended in my manual. A higher gear means lower rpm, which results in a closer rev match to neutral; and since I'm already coasting I don't really need as much torque. Make sense?
#238 of 472
Re: coasting techniques for better mpg [nippononly] by jkandell
Mar 07, 2007 (7:12 pm)
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Replying to: nippononly (Mar 02, 2007 12:51 pm)

"Any time your engine is running, it is using gas. It can't run without it. So coasting in gear (with a manual) using the engine to brake uses roughly the same amount of fuel as just allowing it to idle."
 
If you're idling the engine has to use fuel to keep things moving just enough. But if you're engine braking, doesn't the ecu on cars like the yaris shut off the fuel injectors? The moving pistons from momentum keeps it "running", no?
#239 of 472
Re: coasting techniques for better mpg [jkandell] by lucynethel
Mar 08, 2007 (6:52 am)
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Replying to: jkandell (Mar 07, 2007 7:12 pm)

I read on & ON about this poor gas mileage and how it has GOT to be for a bunch of ridiculous reasons on "THIS" group. Yet every other REAL group of owners show a ton of us who just don't get good gas mileage!Seems to be tied to age AND driving expertize of the members of the "REAL" Yaris groups too. Suggest everyone try:
 
http://www.yarisworld.com/
 
And for the RECALLS:
http://www.tundrasolutions.com/forums/yaris/71419
-yaris-recalls/
 
http://au.toyotaownersclub.com/forums/lofiversion/index.php/f6.html
 
http://www.toyotanation.com/forum/f26
 
There are so many more if anyone discovers GOOGLE......
 
 Point being, a LOT of folks routinely get 25-26 MPG City and 30-32 MPG Highway. A LOT of folks are just "dreaming".......
#240 of 472
Re: coasting techniques for better mpg [lucynethel] by jcash2ds
Mar 08, 2007 (10:09 am)
Reply

Replying to: lucynethel (Mar 08, 2007 6:52 am)

I read on & ON about this poor gas mileage and how it has GOT to be for a bunch of ridiculous reasons on "THIS" group. Yet every other REAL group of owners show a ton of us who just don't get good gas mileage!Seems to be tied to age AND driving expertize of the members of the "REAL" Yaris groups too.
 
Didin't you give up your Yaris? You are the one still looking in every nook and cranny for something against the gas mileage...
 
 Suggest everyone try:
  
http://www.yarisworld.com/

 
Yes do look at YarisWorld.com - a great bunch of Yaris fans there. Here's the link:
http://www.yarisworld.com/forums/showthread.php?t=38
 
Look for yourself and tell me how many- better yet, what percentage- of the people are getting the "horrible mileage" you claim. What is horrible? 29?? That beats most other cars' Real World MPG, any make, any model in the city.
  
And for the RECALLS:
http://www.tundrasolutions.com/forums/yaris/71419
-yaris-recalls/

 
As for recalls, maybe you need to read the article before you try and scare someone.
Link: http://www.tundrasolutions.com/forums/yaris/71419-yaris-recalls/
 
Comment : "" NEWS: Toyota recalls vehicles over faulty engine part
 
TOKYO (AP) -- July 18, 2006 — Toyota said Tuesday it is recalling about 420,000 vehicles globally, including some Echo and Prius models sold in the USA, over a faulty engine part.
The faulty part is the latest in a string of problems requiring recalls by Toyota, raising doubts over whether the automaker can maintain quality standards amid booming sales.
 
The recall affects about 150,000 cars sold overseas, mainly in the United States and Canada, Toyota spokeswoman ...said. These autos were manufactured in 2001. ""
 
Had you actually read the forum, you would've noticed it is talking about Echo and Prius models, manufactured in 2001. The Yaris is new for 2007, isn't it?
 

There are so many more if anyone discovers GOOGLE......
  
 Point being, a LOT of folks routinely get 25-26 MPG City and 30-32 MPG Highway. A LOT of folks are just "dreaming".......

 
What do you consider "a LOT" ? 10, 15 people with mileage under 30 mpg ? considering the tens/hundreds of THOUSANDS of Yarii sold, in reality, your "LOT of folks" turns out to be a minor, and unfortunately unlucky, percentage.
 
Fuel Economy . Gov
http://www.fueleconomy.gov/mpg/MPG.do?action=mpgData&vehicleID=22749&browser=tru- e&details=on
 
4 out of 24 vehicles from different states registered under 30 mpg.
 
On the other side of the spectrum, 6 out of those same 24 cars registered 39+ mpg. O the injustice!
#241 of 472
Re: coasting techniques for better mpg [jcash2ds] by lucynethel
Mar 08, 2007 (3:11 pm)
Reply

Replying to: jcash2ds (Mar 08, 2007 10:09 am)

Liar, liar pants on fire!
#242 of 472
Re: coasting... [jkandell] by nippononly
Mar 08, 2007 (10:18 pm)
Reply

Replying to: jkandell (Mar 07, 2007 4:51 pm)

Yes, that makes good sense, but you should be careful not to lug the engine, which can damage it and/or the transmission over time.
 
And in the larger picture, you have to ask which will cost you more over time, the 0.05 ounce of gas that throttle blip costs you each time, or the extra bite out of your gear synchros each time you put it in gear.
#244 of 472
Re: coasting techniques for better mpg [jkandell] by nippononly
Mar 08, 2007 (10:29 pm)
Reply

Replying to: jkandell (Mar 07, 2007 7:12 pm)

No, the throttle plate has an idle position that allows some air/fuel mixture to get through at all times - this is where it sits when you are engine braking. That air and fuel has to be burned or the engine would flood as you were driving along. Not to mention, you would have the most drastic engine braking ever! You would never need your brakes at all with that much engine braking.
 
Turning your ignition off while the car is running turns off the fuel injection system. Imagine doing that, and that is how much engine braking you would have if normal engine braking worked as you described. Of course, that would be super-jerky and inconvenient - in fact, that is why Toyota came up with HSD, to do exactly what you describe for real! In Toyota hybrids, the gas engine ignition and fuel injection shuts down as soon as you step off the gas and the engine itself quits - the electric motor steps in to make the transition smooth (eliminating the "super-jerkiness") and collect electricity from the car's momentum at the same time.

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