Fuel Economy

[eTiMaGo]

Originally Posted by marcus

i been driving normal.. and im barely getting 14km/l most i did was 14.5 per liter.. thats about 6.9 l/100km. 5.5-6.9.. i should atleast be in between.. and my car has almost 5000 km on it. i dont get it..

It's a lot to do with your driving distances, I think, maybe you are in the same situation as me.

Normally I have very short commutes (<5km), and the first bar on the gauge drops after 50km.

Right after my last fillup, I went on a much longer trip, almost 100km, and the first bar only dropped after about 75km.

I don't go on long drives like this very often, but if I did, I am sure the overall mileage would be a lot better!

[marcus]

Originally Posted by eTiMaGo

It's a lot to do with your driving distances, I think, maybe you are in the same situation as me.

Normally I have very short commutes (<5km), and the first bar on the gauge drops after 50km.

Right after my last fillup, I went on a much longer trip, almost 100km, and the first bar only dropped after about 75km.

I don't go on long drives like this very often, but if I did, I am sure the overall mileage would be a lot better!

well i live in town.. there may be some shorts trip going to friends house to work id say about 60% hwy.. my first bar actually goes to 120km..but still with that im barely hitting 600 down to empty.. last bar normally blinks at about 530-540 km.. hmmm i wonder...

[stuffy]

@dreagonr, i drove that same stretch last summer and averaged 45 mpg, with an average speed of 110km/h,

i think you've got some funny math at work there:

Well it turns out i did 145.08 miles per 4.498 US gal.

wtf? how did you arrive at these numbers?

best way to figure out mpg is to fill the tank, set the trip odomoter to 0,
refill the tank when it's empty, write down volume of fuel and odometer mileage,
divide distance by volume of fuel.

[marcus]

heres mine.
1st tank 540km with 39.8l fill up = 38.34mi/gal with regular 87 octane
2nd tank ran 535km fill up 38.4l = 39.37mi/gal with premium 89 octane
3rd tank 540km 37.5l fill up=40.69mi/gal with premium 89 octane
4th tank 570km premium fill up @38.00 liters =42.40 m/gal -15km/liter 89 octane
5th tank went to regular gas..48.2 liters ran 711 km 40% hwy (had to add 10 liters in between), calculated about 6.7l /100km,,41.68m/gal ... i was expecting about 6.0 l/100,,,atleast...

but this is from different fuel calculation.. so now im confused...

im doing it by how much km run on the filled up fuel..ex. 550 fill up @ 38.5 l= 14.28 km/liter

[swng]

I am really pleased to see fellow members find F.E. an interesting subject. For everyone's convenience, I repost here some useful links which I think can help calculate our yaris' mpg:

http://www.roity.com/petrol/metcalc.html

http://oee.nrcan.gc.ca/transportatio...ut.cfm?attr=16

http://www.rockymountainmoggers.com/convert.html

https://www.fueleconomy.gov/mpg/MPG.do?action=calcMPG

http://www.vehicleservice.co.za/calc/fuel.html (refers to Imperial gallons)

http://www.sciencemadesimple.net/fuel_economy.php

http://www.hicloneqld.com/fuelcalculator.html (refers to Imperial gallons)

There is useful conversion assistance at the bottom of this page:

http://www.hicloneqld.com/data.htm (refers to Imperial gallons)

The above links do not represent an exhaustive list. Please post any links here if you find them safe and helpful. Edit: Also, use any of these links at your own risk.

Edit: Thanks to marcus, there is another one:http://www.accommodationz.co.nz/economycalculator.html (Post #1422 of this thread) Apparently it is for imperial gallons.

[Edd]

Doesn't the yaris have anything on an LCD screen that tells you the current average fuel consumption? I know some other cars in its class (swift) have that.
The problem is how would you accurately calculate it. From my experience, fuel gauges often stay near the top, then suddenly start dropping faster, so that's too innacurate. The only way I could see this working is if you took the SAME point on the scale, eg the 1/4 mark. Then you fill up with fuel and look at what the petrol bowser says in litres. Reset your trip meter and when the fuel gauge gets back down to that same 1/4 mark you know you have used up that x amount of litres you filled up with and you know how far you went from the trip meter.
Is that how you guys do it?

[Edd]

EDIT: Read this post AFTER the one below it, it's in response to that.

Thanks for that, can anyone in Aus confirm if you got a fuel consumption computer?

[swng]

Originally Posted by Edd

Thanks for that, can anyone in Aus confirm if you got a fuel consumption computer?

Sorry Edd, I accidentally deleted my reply to your Post #1351 in the course of editing. When it comes to computers, I am all thumbs. My reply now reappears as Post #1353. Also, I only said "may". I am not absolutely sure that Australian Yari have trip computers showing the cars' fuel consumption. It is very smart of you to ask for confirmation from other members.

[swng]

Thanks Edd, for raising this point.
Some Yari in Australia and Europe may have an onboard computer (which I think is an alternative name for a gauge/meter showing some useful information including and not limited to e.g. average fuel consumption). However, as of now, Yaris models sold in North America are not equipped with trip computers that can show the fuel economy of the cars as they go. We who live in Canada and the United States have to calculate our cars' mpg numbers by ourselves. Alternatively, we can install an aftermarket gauge in the car to show us the relevant data. I do not have one so I am unable to describe in detail how those gauges may help in this respect. All I know is a couple of gauges available in the market are very useful.
To calculate the mpg numbers, I use one of the calculators available on the internet, the links to which are seen in Post #1350. The calculations are accurate but of course, errors may occur in one area or another during the self-help process. Yet, hopefully, in the long term, i.e., after a number of tanks and calculations, a reasonably accurate average number can be arrived at.
BTW, the methods of calculations/calculators that I have been talking about are not affected by the anomaly about the fuel guage graduation/indication you described.

[swng]

Re: Post #1352.
Sorry Edd! Just visited the websites of Toyota in Australia and Great Britain. Can't find hints about the availability of trip/onboard computers for the Yaris. Probably they are not offered.
Here are the sites:
http://www.toyota.com.au/yaris/
http://www.toyota.co.uk/cgi-bin/toyo...all&id=YA3_exp

May be our knowledgeable members can supply information on this subject.

[stuffy]

just achieved 41 mpg (us) on my latest tank, almost entirely highway driving, probably an average speed of 110 km/h.

[swng]

Originally Posted by stuffy

just achieved 41 mpg (us) on my latest tank, almost entirely highway driving, probably an average speed of 110 km/h.

That's not bad at all for normal driving! May be just a little too fast though!

[stuffy]

That's not bad at all for normal driving! May be just a little too fast though!

lol, yeah, i figure i could have done better if i'd kept it at 100,

but like you say, it was essentially normal driving, and a lot of it in heavy traffic (401 holiday weekend traffic)

[Nigal]

Originally Posted by PK198105

guys cars r meant to be driven not pushed, i drive 110-120 and i still get great mileage, whats the point of buying a car if you will be driving it at 70 -90 on the highway, just buy a bus pass same experience. now dont get me wrong,to each his own , im not here to tell you how to drive, but i find some of you are taking this gas saving to an extreme. you buy a car for the conveinence , comfort and time saving , not to save on gas otherwise you would just need a bicycle , no gas used now thats a saving. That said enjoy your Yariss Echos and other awsome cars that dont guzzle that i think is enough also im not telling you to break speed limits and laws, just go with the flow. Thats my 2 cents (damn i wont have enough for the next fill up lol)

I'm not doing anything extreme really. I cut my driving back from 65-75 mph to 55-65 mph. I get on the interstate, set the cruise and just chill out. Because I'm not driving 75-80 mph I don't have to deal with soccer moms dragging ass in the fast lane and stressing out because people won't get out of my way. And the amount of time I lose by slowing down isn't even noticeable.

[Nigal]

We had a cool couple days and I didn't use the AC much at all and ended up getting my highest combined mileage yet...43.3 MPG!

[keesue]

Originally Posted by Nigal

We had a cool couple days and I didn't use the AC much at all and ended up getting my highest combined mileage yet...43.3 MPG!

What's your average mph at cruise speed?

[Nigal]

Originally Posted by keesue

What's your average mph at cruise speed?

I'm not sure because I drive about 40/60 city/hyway. The only time I had used it for a long trip where it was all hyway miles was three months after I bought it and I averaged 40mpg but that was with about 400 pounds of gear thrown in.

[keesue]

Originally Posted by Nigal

I'm not sure because I drive about 40/60 city/hyway. The only time I had used it for a long trip where it was all hyway miles was three months after I bought it and I averaged 40mpg but that was with about 400 pounds of gear thrown in.

Given that, you are getting stellar mileage!

I bought the Yaris for the fuel efficiency as my daily commute car (56 miles roundtrip @65 mph = 39.5 mpg). I wanted the fuel economy and to reduce my carbon footprint. I have a 2001 turbo volvo (S60-T5) as well as my old 1981 Turbo Volvo. The S60 gets 25 on the highway and 21-ish in the commute. The old '81 was getting 20 avergage in the commute but required premium fuel. I didn't want to put the miles on the '01 so enter the Yaris! The cost savings have been tremendous and the conservation is a big plus.

In another thread, there was a comment on conservation. It is funny to see a single person in a 2.5 ton SUV commuting to work gettting 13-15 mpg average. I know some of the newer models get closer to 20 but we are getting double that.

We will all face the prospect of dwindling resources, and I submit that it feels pretty good doing my part now. That's just my editorial two-cents worth. I still think the car is a blast to drive.