Fuel Economy

[Blenjar]

im so happy my job, they pay my traveling...48 cents a mile.

-- Blen

[marcus]

i figured its about 13.8km/liter...full tank down to empty will be aprox 580 kms. when am i gonna hit 600 km.

[swng]

Originally Posted by marcus

i figured its about 13.8km/liter...full tank down to empty will be aprox 580 kms. when am i gonna hit 600 km.

Soon enough.
I guess in your case, if all other things remain unchanged, the weather, which should be warming up, should help you hit or exceed 600 km per tank.
I understand that you are just calculating (figuring) it but not really driving to the last drop of gas.
Enjoy your fuel economy quest!
Regards.

[nsmitchell]

34.8MPG today. Mostly City! My MPGs are on the way up!

[boris13]

Well, I only got 31 mpg on my first tank, but I've been driving fairly aggressively, so I'm not too disappointed.

[marcus]

first 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 unbeknownst???

[swng]

Brief update:

About 38 mpg (Imperial) for the last tank. That is equal to about 31.66 mpg (US), or 13.475 km per liter. City/highway driving ratio was about 40/60. It used to be about 30/70 before that. Load was 2 people plus some belongings most of the time.
Trying Octane 92 now. No real improvement expected but just want to try it.
Last report is at Post #1,026.

[marcus]

you been seing the gas mileage in here and i know mileage gets better after the break in period but what was the kilometers on the odometer on that final break in period..for a yaris to have the highest gas mileage possible?? jsut curious if people get it after 1600 km..from toyota manual book.

Originally Posted by swng

Brief update:

About 38 mpg (Imperial) for the last tank. That is equal to about 31.66 mpg (US), or 13.475 km per liter. City/highway driving ratio was about 40/60. It used to be about 30/70 before that. Load was 2 people plus some belongings most of the time.
Trying Octane 92 now. No real improvement expected but just want to try it.
Last report is at Post #1,026.

[swng]

Thank you so much for showing interest in the subject of this thread.

I am no expert but if the manual (page 178 on the manual for my Canadian 06 HB) mentions 1,600 km for the break-in period, there must be a strong reason for that. I personally believe that even after 1,600 km, the break-in can continue for a long while i.e. a good driving style and suitable maintenance can still help smooth out the car's operation further. Some people see a steady rise in their average mpg numbers until much much more than 1,600 km. However, too many factors affect a cars fuel economy (F.E.), so it would be hard for a layman like me to tell how much of the car's improvement in F.E. is actually due to the break-in process. May be only a scientific experiment done in a controlled environment can help in this respect.

IMHO, among the more important factors, other than breaking in, there are at least the following things that will affect a car's fuel economy:

-The driving style(s) e.g. aggressive or conservative,
-The environment/traffic conditions in which the car is driven e.g. hilly roads, stop and go, bumper to bumper, or non-stop highway etc.,
-The weather e.g. summer, winter, rainy, windy etc.,
-The road conditions e.g. smooth surfaces or uneven/unpaved roads etc.,
-The up-keep and modifications of the car e.g. , maintenance, mineral/synthetic oil, tires and tire pressure, and mechanical/electronic/aerodynamic modifications (the list is too long for here) etc.,
-The load (and wind resistance for that matter) e.g. people and luggages, roof racks, towing etc.,
-The degree of the driver's being conscious about F.E. and the fuel saving techniques he/she uses. Please see these for example and reference:http://publicarticles.info/articles/...ency/index.asp, and http://en.wikipedia.org/wiki/Fuel_ec...urement_cycles.

The list at above is hardly exhaustive. Even where you park can affect you F.E. Say if you park under the sun in summer, your A/C will have to work harder when you start to drive, which means higher fuel consumption.

What I am trying to say is that there are other things that will affect a car's F.E. so that it is not so easy to tell how much more F.E. the break-in period can bring about, though it is my general understanding that a good break-in process can surely help.

I believe once a driver becomes F.E. conscious, he/she will find some way to bring about some kind of improvement, sooner or later.

Just my 2 cents. Safe and happy motoring!

[churp]

Up to 4,300 miles I got anywhere from 31 to 36mpg, after that I haven't gotten below 38 and have had up to 42 and I have 6,500 miles now. Why???....could be the 42psi I put in the tires, the lowering springs dropped it 1.5" (less drag?), weather got nicer, started using 91 octane, or maybe the newness wore off and I drove more sensible? Just know that I've averaged over 39mpg the last 2,300 miles!!!!!! LOVE IT!

[Driver]

I've had my Yaris since last November am averaging 33.2 mpg, My last fill-up I averaged 33.5 mpg.

[grampi]

As I've been reading through the posts in this forum, I've noticed most people seem to get low to high 30s MPG with the Yaris. I'm a bit puzzled as to why the Yaris doesn't seem to get any better fuel economy than my '99 Corolla. The worst mileage I've gotten was 34 and the best was 41. I typically average about 37 or 38. The Yaris is lighter, has a smaller engine, and has VVTI technology (which my Corolla doesn't have). It should get better mileage than my Corolla, but it doesn't appear that it does. I wonder why?

[eTiMaGo]

depends on driving style I'd say, more than likely you'll get better mileage than the averag numbers you see here.

[grampi]

Originally Posted by eTiMaGo

depends on driving style I'd say, more than likely you'll get better mileage than the averag numbers you see here.

That's a good point that I didn't even consider until you mentioned it. I also seem to get better mileage with my Corolla than other people get with thiers, so maybe my driving habits are more condusive to achieving better fuel economy. Come to think of it, I'm always the one getting passed on the highway. While I'm cruising along at 75 MPH, everyone else is passing me at 80+ MPH. I might see low 40s with a Yaris.

[eTiMaGo]

Only one way to find out

[grampi]

I know. Don't rub it in.

[swng]

Latest tank returned about 41.78 mpg (Imperial) or 34.77 mpg (US) or 6.77 liters/100 km or 14.78 km/liter.
City/highway = 30/70. A/C was on about 20% of the time. Load was two people plus some belongings most of the time. Driving style: Synchronize with normal traffic.
Weather has been gradually warming up, and it must have helped a bit.
Last update is at Post #1145, Page 77.
Historical:http://www.gassavers.org/garage/viewgaslog/264

[swng]

Originally Posted by swng

Latest tank returned about 41.78 mpg (Imperial) or 34.77 mpg (US) or 6.77 liters/100 km or 14.78 km/liter.
City/highway = 30/70. A/C was on about 20% of the time. Load was two people plus some belongings most of the time. Driving style: Synchronize with normal traffic.
Weather has been gradually warming up, and it must have helped a bit.
Last update is at Post #1145, Page 77.
Historical:http://www.gassavers.org/garage/viewgaslog/264

Filled up on 2 Jun 07 and the result was:

About 563 km traveled. Consumed 38.096 liters of fuel and used C$42.82 to fill back up.
Approximately 41.76 mpg (Imperial), or about 34.76 mpg (US), or 14.78 km per liter, or 6.77 liters per 100 km. I occasionally carried three passengers with their belongings, and the A/C was used about half of the time. Weather was good but warm. Driving style was - keep pace with traffic and be fuel economy conscious. No exotic measure used to save extra fuel. Other conditions similar to last report quoted i.e. Post #1201 at P.81.

This time, I used this free calculator (except for mpg (US)) which also contains a pageful of usual fuel saving tips:

http://www.vehicleservice.co.za/calc/fuel.html

For the mpg number in US gallon terms, I used the calculator provided free here:

http://www.gassavers.org/garage/viewgaslog/264