Fuel Economy

[lispat]

Originally Posted by yariman

The Yaris engine is designed to run on the fuel that is recomended in your manual. ( different parts of the world ) Unless you can change the timing and fuel maps etc. it won't run any better on a higher octane fuel. There are more additives in better fuels such as Chevron has more Techron in their higher graded fuels.

I tried higher octane in my Tacoma, it doesn't like it, I would stay with what Toyota says, they have a lot of expertise. If not we'd be driving something else. Ooooh, I wouldn't like that.

[spkrman]

premium did fine in my yaris, no major gain anywhere though.

[nsmitchell]

Originally Posted by spkrman

premium did fine in my yaris, no major gain anywhere though.

Premium gas is ONLY for high compression engines. To put it in your Yaris is truly wasting money. In the following article, he even mentions "The Family Toyota".

http://www.straightdope.com/columns/041008.html

[fearturtle44]

I would recommend a fuel injector cleaner every 7500 miles. Just put in an empty tank prior to fill.

Kevin

[keesue]

I concur with the statement: "Premium is for high compression engines". The Yaris is not a high compresson engine and does not require premium. It does not suffer detonation which is the sign of an octane level insufficient to support fuel burn over explosion (detonation). It is a complete waste of money. As to fuel system cleaners, if one exclusively uses a high quality fuel, such as Chevron with Techron, it is less of a requirement. Most new vehicle certifications for emissions and fuel efficiency ratings are performed using Chevron (by the way). The difference in cost between grades can be significantly offset by using a fuel system cleaner when using lower grade fuel.

[Violin]

Liters?

Kilometers?

What is this - Soviet Russia?

[Lafiro]

Originally Posted by Violin

Liters?

Kilometers?

What is this - Soviet Russia?

Yeah seriously, WTF is all that. I just want a plain answer/response like 30mpg. Not no 1324L per 2398443something.

[swng]

As the starter of this thread, I am pleased to be at your service. 7.9 liters per 100 km is about 29.87 mpg (US) or 35.7 mpg (Imp). Here is a useful link to help do the conversion (It was recommended by another member earlier):

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

Here is another one:

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

If you use the second one, which is Canadian, you can type in your numbers, get the calculated results and then copy and paste them to your next post on this thread. I think if you only copy and paste the few lines containing your fuel economy, there should not be any copy rights issues, but correct me if I am wrong.

Enjoy!

[swng]

[eTiMaGo]

Originally Posted by bigsky2

Komrades, I repeat.

7.6~7.9 LITRES PER 100 KILOMETERS. WINTER MILEAGE.

BRRRR.

What's that in barrels per fathom?

[stuffy]

What's that in barrels per fathom?

lol, nice one eTIMago

i suppose violin is right, soviet russia did use the metric system, but then again, so does the entire planet.....except i think there are still 3 hold out countries, still clinging to the past, Myanmar, Liberia and what the hell is the name of that other place?

[Billstein]

My first tank on the silver car was 35 mpg us ,
My second was on a road trip ok I was in a hurry.
I recieved a bit lower 29 M.P.G. us
I was driving around 80mph to 85mph +
I know very sad.
But she wanted to go.

[superjens]

I just picked up a 2007 3-door 5-speed a few weeks ago, and I'll be tracking my mileage closely as I've done with all my cars in the past. A year ago I drove a 13-MPG SUV, sold it and went to a 50-MPG Diesel Golf, and now I'm curious to see how far I can push this Yaris. First tank got me just a hair under 30 MPG, but I have no idea if the tank really was full to start off with.

I've been using the same simple speadsheet forever, which calculates from liters into gallons, kms into miles, so I can see both L/100KM and MPG quickly. It also plots everything into a graph for visuals.

I only have 1 fillup so far, but you can see what the end result is here:

http://www.superjens.com/cars/Yaris-Stats/index.htm

If you want the spreadsheet for yourself:

http://www.superjens.com/cars/Yaris-Stats/stats.xls

When I had the 13-MPG SUV (two years worth of city/hwy/offroad averages), I drove across Canada and back in it one summer. With a few tricks and some really careful driving I managed to get 26 MPG average! That was with a bike and other junk on the roof.

I'm looking forward to some long road trips next summer in this little Toyota, my bet is I'll be able to squeeze 50 MPG out of it.

[swng]

Looking forward to reading your further reports.

[nsmitchell]

I got 31.5MPG the other day. Lead foot with about 50/50 city/hwy. I need to lighten my foot so I could get the 35-40MPG like everyone else.

[TDL]

Does your gas mileage get better once the vehicle passes the 1000 miles break in mark or ? My first gas tank I got 375miles, second one I got only 325miles, 3rd looks to be less. Not sure how anyone is getting 40+ mpg.

Slow starts, 65-70 on the highway.

I bought this vehicle specifically for the gas savings.

Liftback, manual.

Thoughts?

[stuffy]

it appears you are getting about 25 mpg right now, assuming you are filling up a full tank (approx. 10 galons u.s.).
this is exactly what i was getting a year ago when my car was new, and with winter fuel.

now, i'm getting about 34 mpg around the city with winter fuel.

[BMGYaris]

Originally Posted by TDL

Does your gas mileage get better once the vehicle passes the 1000 miles break in mark or ? My first gas tank I got 375miles, second one I got only 325miles, 3rd looks to be less. Not sure how anyone is getting 40+ mpg.

Slow starts, 65-70 on the highway.

I bought this vehicle specifically for the gas savings.

Liftback, manual.

Thoughts?

I had a similar experience to yours i will share later. The only thing i can think is that there is a thread on here that shares the experiences of one guy who ran out of gas and it caused him to get someting like 19mpg for his next couple tanks. It turns out that there are sensors in the tank that adjust your fuel consumption somehow for very low feul levels. Apparently that is one reason why the manual recommends filling up when you have two bars left.
Also, according to the NHSTA every 10mph extra you travel on the interstate cost an average of 20% fuel economy. Thus if you are going 70 instead of 60 you will use 20% more gas. That isnt exact im sure, but you can get the idea it is a pretty handsome number.



My first tank got 29, i filled up and i only had 0.8 gallons left in my tank, my second got 25mpg, my third got 23 (doing about 80-85% highway at 60mph steady) and then i filled it up, took a road trip on the interstate and i got 34 mph each way going over 70, probably averaging 75 mph, a little 85. (only 100 miles each way though). Earlier I had taken it in and had the transmission inspected and everything checked out ok. My theory is that when we run the fuel so low it messes up the sensors, but after a point they automatically reset--seems to have happened to me as after i filled up again i got such huge improvments driving so fast on the interstate. There were a couple other people that talked about this on here elsewhere.