Fuel Economy

[boris13]

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

[Carvin'07]

Originally Posted by Carvin'07

I was not being too cautious with mileage the last little while. It was on average -15 degrees C for a few weeks here, on winter tires, and with lower pressure (about 30psi for better contact patch). I acheived 30.2mpg US driving 70 hwy / 30 city shifting at 4500rpm (the car is a little faster in really cold weather, so it is more FUN).

Last tank I finally toned down my driving. I started shifting at 2500 and really took it easy. I acheived 36.4 mpg (70hwy/30city). It's ok I guess.

Hey all...my last post is above.

My latest...70hwy/30city shifting at 3500rpm on 205/40/17 Kumho MX

589.6 km on 38.66L = 6.56L/100km = 35.87 US MPG

542.6 km on 36.02L = 6.64L/100km = 35.42 US MPG

Carvin'

[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]

hes drivin an echo ..lighter as well..it would be easier for him to reach it..but im sure its doable.. u just need... .26 m/gal...to hit it.. daym you should have rolled in down the hill..

Originally Posted by BailOut

Congratulations, ECHOKnight2000! That's awesome!

I haven't quite hit 50 myself yet. 49.74, but not 50. hehe

[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.

[lowkey]

Best to date
535 Km on one tank!
Driving without the A/C.
1 1/2 weeks of city daily driving.

[boris13]

Second tank: 33 mpg (up from 31 mpg on the first tank).

[naossoan]

I don't know what my MPG is currently.

But I filled it up last time and I'm down 3 bars at just over 200 Km I think, all city driving.

It's hard for me to like go all the way down to the fuel light on, cause I live on Vancouver island (Canada West coast) and if I go up island about 50 KM gas is like 8 cents cheaper...so I'll fill up on the way back there and stuff so it's hard to get an accurate reading (unless i see how much fuel I put in and do the math which I'm waaaay too lazy to do that haha.)

so I'll post when I get an accurate MPG reading.

[churp]

Originally Posted by naossoan

I don't know what my MPG is currently.

But I filled it up last time and I'm down 3 bars at just over 200 Km I think, all city driving.

It's hard for me to like go all the way down to the fuel light on, cause I live on Vancouver island (Canada West coast) and if I go up island about 50 KM gas is like 8 cents cheaper...so I'll fill up on the way back there and stuff so it's hard to get an accurate reading (unless i see how much fuel I put in and do the math which I'm waaaay too lazy to do that haha.)

so I'll post when I get an accurate MPG reading.

Guess you'll never know, because thats the only way to figure gas milage (unless you buy a scangauge), your fuel gage DOES NOT tell you how many gallons you used. Without keeping track for several fillups whether its a full tank or a quarter tank at a time you may as well be pickin a number between 25 and 50. No offense....but come on already!?!?