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05-30-2009, 11:15 PM | #1 |
Drives: Yaris 2009 automatic Join Date: May 2009
Location: Quincy
Posts: 58
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Why is my new 09 Yaris MPG is so low
Hi everyone,
I got my yaris a week ago. It is now 600 miles in total, I filled two time gas. I divided my total mileage by the total gallon of gas I filled, I only got 33.x MPG in average. My car only come with 7 miles so it should affect a lot in calculation of average mpg. I saw everyone here have a mpg above 35 and many of them have it close to 40 or even more... Can anyone tell me why please? How can I have a mpg like that? The mpg of 09 yaris is 29 local and 35 highway.... How can all you guys have it more than 35....><???? |
05-30-2009, 11:22 PM | #2 |
Drives: S sedan Join Date: May 2009
Location: MI
Posts: 120
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Your calculation is fine (total miles divided by total gallon).
What you haven't told us is your driving condition. That has everything to do with what type of mileage you should get from your car. FYI, there was a poster getting 29mpg in NYC. I'd say, that's pretty damn good. If you do a lot of stop-n-go traffic, you probably won't see over 35mpg easily. On the other hand, if you do 95%+ of your driving on the freeway, then you should see anything from 40mpg+ depending on the traffic & terrain. Tell us more about your driving situation & your location. Also, measure your tire pressure when the tires are cold (in the morning, or after parking the car for a while). -SC |
05-30-2009, 11:32 PM | #3 |
I would pay more attention to it after break-in
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05-31-2009, 12:21 AM | #4 |
Banned
Drives: 2007 4 Door Yaris Join Date: Jan 2009
Location: Southern California
Posts: 1,357
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As Cosworth pointed out, I only get over 35 if I do more than 90% highway on a tank.
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05-31-2009, 12:31 AM | #5 |
Learn to Relax
Drives: 2007, Meteorite, LB Join Date: Dec 2008
Location: Anaheim, CA
Posts: 2,070
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The main reason for low mileage is short trips. If the engine doesn't fully warm up the ECU runs the engine rich. It takes three to five miles for the engine to warm up. You need to drive seven miles or more to see 30+ MPG. If you do long freeway runs, you'll get 40 MPG.
Last edited by yaris-me; 05-31-2009 at 03:06 PM. |
05-31-2009, 03:39 PM | #6 | |
Drives: 2008 Yaris Liftback (Sprocket) Join Date: Oct 2008
Location: San Antonio, Texas!
Posts: 2,799
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Quote:
I noticed as slight improvement in MPG after surpassing 5000 miles in my Yaris. I went from ~34-35 MPG to 36-37 MPG. Your car has yet to break in, so give it a little time and don't worry about it until you've at least done your first oil change. Plus, driving 80 MPH will lower your fuel efficiency. For best results, keep it around 60 MPH. And during the break in period, do not drive at the same speed for extended periods of time, speed up and slow down on occasion as it helps with the break in. By the way, didn't you read your owner's manual? If not, you really should do so before anything else? Also, is yours a stick or an auto? The auto will likely get a mile or two less per gallon. Plus, how you drive is a big factor. You can't drive it like a track car and expect it to give you great MPG in return. |
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05-31-2009, 04:27 PM | #7 |
Banned
Drives: 2007 4 Door Yaris Join Date: Jan 2009
Location: Southern California
Posts: 1,357
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warming up and fully warming up are two completely different things. When the "cold" light goes off, it just means its warm enough to use normal shifting. Your engine reaches peak efficiency quite a while after the light goes off.
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05-31-2009, 05:49 AM | #8 |
DWEED
Drives: 3DR 2008 Metorite Metalic Join Date: Oct 2008
Location: Arizona
Posts: 1,161
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You are assuming that your tank was completely filled by the dealer. When I got my Yaris all the bars were lit. Within 5 miles the first bar went out. Now it usually takes 80 miles for the first bar to go out. My car was 2 gallons short of being full.
Throw out your first tank milage or start calculating from your next fill up and you might see better numbers.
__________________
Making a decision without following it with an action is still a fantasy. |
05-31-2009, 07:17 AM | #9 | |
Is now a Corolla S Owner
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Quote:
Good point. Don't be discouraged. Like others have said, driving conditions have EVERYTHING to do with MPG. Break-in is probably a factor, and definitely check tire pressure as someone already mentioned. Keep us posted as you get more miles on your car. Tom |
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05-31-2009, 08:27 AM | #10 |
Drives: 2010 Carmine Red hatchback Join Date: Mar 2009
Location: Colorful Colorado
Posts: 208
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What they said! My mileage has steadily improved with each tank......I started out with 34 MPG and my last tank was 40 (I have ~3000 miles on my car now). Once the engine loosens up a bit you should see a little better numbers, although 33MPG is exactly what the window sticker says you should be getting, so it isn't really "low", per se.
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05-31-2009, 10:38 AM | #11 |
Drives: Yaris 2009 automatic Join Date: May 2009
Location: Quincy
Posts: 58
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I see.
I live in Boston, I drove to Amherst for the first tank of fuel.... it's two hours driving for one trip and totally 4 hours for round trip.... I carelessly forgot I should not drive more than 65 for new car at the first 3000 miles......I drove 80 mph....=___= probably it's the reason I got lower mpg.... second tank of fuel, i spent more time to drive local and to the dealer...which is only half hour driving..... Can someone tell me what does break in mean? I check dictionary and still don't understand..... |
05-31-2009, 05:18 PM | #12 | |
DWEED
Drives: 3DR 2008 Metorite Metalic Join Date: Oct 2008
Location: Arizona
Posts: 1,161
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Quote:
You will probably be ok, however as said before break in means to vary your speed and take it easy for the first 500 miles.
__________________
Making a decision without following it with an action is still a fantasy. |
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06-01-2009, 01:01 PM | #13 | |
Drives: 2009 Yaris 3dr Join Date: May 2009
Location: California
Posts: 135
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Quote:
Check your tire pressure and make sure its at least the same as the value on the drivers door jam. Others will suggest than you inflate to the Tires maximum pressure rating, but I don't recommend doing so to a persistent speeder. BTW turn the engine off once you get pulled over by the traffic police. This will also improve MPG Remove all the personal stuff from the car which you didn't need to carry. Added Weight also reduces MPG. Besides the engine, the automatic transmission needs to break in as well. Hopefully you didn't mash the gas while you were violating posted speed limits as harsh shifts rather than firm smooth shifts will remove more fiction materials from the internal bands and clutches of the transmission. If you notice the shift into reverse has a louder "thud" now than when the car was new, chances are you removed more of the friction material during the break in period than was needed. This won't hurt the transmission but you get the knowledge that the loudness of the reverse shift was mosting your doing for the next 150,000 miles or until transmission rebuild which ever comes first. Don't feel bad. I let my wife drive my 2009 3DR manual transmission Yaris last Saturday. She managed to burn off at least 20,000 miles of clutch on a 6 mile trip. Of course in her view its clearly the inadequacy of the car. We won't be repeating the experience any time soon. She'd wearout the automatic just the same. At the moment my wife is driving a large idiot proof 3500 dually pickup. Totally overbuilt hardware, but she won't get hurt too badly and the 4X4 suspension helps keep her speed under control too. Driving too fast rips the steering wheel from her hands over the country roads. She has not put it in the ditch yet so I think (hope) she's learning. |
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05-31-2009, 12:20 PM | #14 |
Is now a Corolla S Owner
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Break-in is the time when moving parts have a chance to "wear-in." Engines loosen up a little as they break-in due to less friction. The piston rings wear-in during break-in, also.
Someone else can do a lot better job than I can of explaining what happens during the break-in period, but what I just said is about the extent of my knowledge on the subject. Tom |
05-31-2009, 04:07 PM | #15 |
Where is Oahu?
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one word "traffic"
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05-31-2009, 04:28 PM | #16 |
Half a Bubble Off Plumb
Drives: 2009 Yaris Sedan Join Date: Mar 2009
Location: Bristol, Tennessee, USA
Posts: 1,593
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My first tank was 32.4 MPG. I've gotten several in the mid 30's and the last couple have been in the 39 range. I've only gotten over 40 on long highway trips. Real heavy stop and go city traffic would bring it under 30, I'm sure. I don't think it's "low mileage." Some folks live where they have flatter terrain than I do, routes where they don't have to stop much, and other factors that help their mileage. I'm not going to get into P&G, FAS and such advanced hypermiling techniques either, though I well understand the principles.
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05-31-2009, 05:49 PM | #17 |
Drives: Yaris Sedan (auto) Join Date: Jun 2007
Location: Toronto, Ontario
Posts: 545
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From my experience with mostly highway driving on entire tanks with an AT sedan:
70-75 mph = high 30's to low 40's 60-65mph = mid to high 40 mpg 50-55mph = low to mid 50 mpg I've never driven 80 mph for an entire tank before, but when I drove 70-75 for an entire tank in the rain on a long road trip, I got my worst tank mileage at 37.62 MPG. |
05-31-2009, 11:11 PM | #18 |
Drives: Flint Mica Sedan Join Date: Oct 2008
Location: Pittsburgh
Posts: 475
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My best suggestion. Change the oil. I had mine for 5-6 months before I changed mine. Brand new, I was getting around 32mpg. After I changed the oil using a Napa gold filter and castrol oil, I now get 40-42mpg.
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