Fuel Economy

[swng]

Originally Posted by nsmitchell

35.8MPG mostly city. Gas is going up all the time. I'm so glad I drive a Yaris. I asked my wife last nite if we could sell our Odyssey and get a Fit. She said "Hell No!", but I had to ask.

BTW - May 24, 2007 was our 10 year anniversary!

Happy belated anniversary and BTW great mpg for city driving!

[swng]

Originally Posted by marcus

try opening your window and driving right beside a wall and accelerate..the wall will revert the noise back to you...on regular youll hear a kinna like knockin on the engine noise only during acceleration if you dont then ur car is fine.. still trying to find out if its due to the timing chain..but it does go away on 89 octane gas.. so mostlikely its either timing too advance or the antiknock sensor not working properly..

Tried that but not much difference heard. Will listen more carefully when the surrounding is quiet. Meanwhile, may be you would like to consider eTiMaGo's suggestion (Post #1214) i.e. ask Toyota to check it out for you to see if there is a problem. I am no expert but I think the car's computer (aka ECU) should be able to adjust ignition timing to suit different fuel octane numbers. Our Yari are designed to run on regular fuel anyway. Still grateful that you have brought this subject up for discussion and wish you best of luck!
You know, when all are equal, we may as well hang on to regular fuel for economy.

[marcus]

ill bring it in tomorrow..

Originally Posted by swng

Tried that but not much difference heard. Will listen more carefully when the surrounding is quiet. Meanwhile, may be you would like to consider eTiMaGo's suggestion (Post #1214) i.e. ask Toyota to check it out for you to see if there is a problem. I am no expert but I think the car's computer (aka ECU) should be able to adjust ignition timing to suit different fuel octane numbers. Our Yari are designed to run on regular fuel anyway. Still grateful that you have brought this subject up for discussion and wish you best of luck!
You know, when all are equal, we may as well hang on to regular fuel for economy.

[uncleyaris]

hey all, on my last tank 38.254 litres to fill drove 626.30 km. I think that calculate to 46.27 mpg, or 6.10 litres per 100km. Not bad!!!!!

[swng]

Originally Posted by uncleyaris

hey all, on my last tank 38.254 litres to fill drove 626.30 km. I think that calculate to 46.27 mpg, or 6.10 litres per 100km. Not bad!!!!!

Good numbers uncle! Lots of highway driving?

[uncleyaris]

no, but 5th gear and 60km/hr

[swng]

Originally Posted by uncleyaris

no, but 5th gear and 60km/hr

Noted with thanks.

[Ah Yum]

Originally Posted by uncleyaris

hey all, on my last tank 38.254 litres to fill drove 626.30 km. I think that calculate to 46.27 mpg, or 6.10 litres per 100km. Not bad!!!!!

That's better than 38 MPG US, overall I'm around there too.

[swng]

Just saw your gaslog at GasSaver.org Ah Yum (Post #1222). You know a lot of practical fuel saving techniques and your results are good. Please post more here.

[Ah Yum]

Originally Posted by swng

Just saw your gaslog at GasSaver.org Ah Yum (Post #1222). You know a lot of practical fuel saving techniques and your results are good. Please post more here.

Thanks for your kind words. But I'm afraid some of the hypermiler's ways are too controversial to be discussed in public.

I wouldn't feel too bad to about 30 MPG around town. If commited to save on gas, anyone could simply drive less. If I take lots of 40 MPG two-minute trips while you make 30 MPG on longer commutes but bike or walk at other times, we might still be comparable in overall fuel usage.

[marcus]

FOUND OUT! something...its quite interesting as well...

1/5000 (1 part acetone 5000 part fuel ) mixture will give you better fuel mileage up to about 27% gas savings. may be worth to try that doesnt sound much to mix with fuel..hmmmm interesting..

http://www.pureenergysystems.com/new...00069_Acetone/

[BailOut]

Acetone will certainly help your FE, at least at first. Then it goes downhill as your engine goes downhill because Acetone eats through just about any non-metal parts like gaskets, seals, hoses, tubes, etc.

It is not worth it, especially for any length of usage.

[marcus]

it does but i dont think it will do it on that mixture.. too small of an amount for it to do it.

[BailOut]

How about we mix you a nice glass of ice water with 1:5000 lye, and then have you drink one glass of it every day?

Trace amount or not, some things just are not safe in any quantity.

[marcus]

nothing will happen then coz "lye" doesnt exist on my dictionary...lolz.... but i see what you mean.." dont drink acetone "...hehehhehahahaha

[swng]

Originally Posted by Ah Yum

Thanks for your kind words. But I'm afraid some of the hypermiler's ways are too controversial to be discussed in public.

I wouldn't feel too bad to about 30 MPG around town. If commited to save on gas, anyone could simply drive less. If I take lots of 40 MPG two-minute trips while you make 30 MPG on longer commutes but bike or walk at other times, we might still be comparable in overall fuel usage.

Thanks for the response! Got the message. Makes very good sense to me. I am very impressed by your pragmatic, balanced, and down to earth attitude toward this subject. Also, I fully understand that hyermiling is a subject very different from basic day to day fuel economy. That is why I have edited the subject of Post #1 of this thread to "Fuel Economy in General". I regret that I have not been able to change the name of this thread accordingly. You know, I did use the word "practical" in Post #1223.

I am glad that the Yaris is a fuel economical car in its own right and almost everybody who pays attention to responsible driving can achieve a reasonably good level of F.E. with it.

Though inevitably a few (certainly not all) very exotic hypermiling techniques may give rise to some safety, legal, environmental, warranty and wear and tear concerns of a varying degree, I still think that it is good to know that such techniques exist. It is up to the good sense of individuals whether to try them. For me, I bought the Yaris for its good F.E., amongst other things such as comfort, flexibility, resale value, ease of driving/parking, and of course, reliability.

I am personally addicted to achieving good F.E. but will not give up comfort and relaxed driving to achieve the last little bit of fuel saving.

For academic interest, I still try to know more about not only the easy/practical but also the advanced/exotic fuel saving techniques, though I for sure will not put every one of them to actual use.

Please post more here.

[swng]

Originally Posted by marcus

FOUND OUT! something...its quite interesting as well...

1/5000 (1 part acetone 5000 part fuel ) mixture will give you better fuel mileage up to about 27% gas savings. may be worth to try that doesnt sound much to mix with fuel..hmmmm interesting..

http://www.pureenergysystems.com/new...00069_Acetone/

My friend, before you proceed, please note that this is a very controversial subject. Please read these threads for some reference:
http://www.benzworld.org/forums/gene...hlight=acetone
http://www.gassavers.org/showthread.php?t=2142

I personally do not think the "saving" justifies the risk (or uncertainty, to say the least). However, I will always try to keep an open mind towards this kind of things. If you have further reference materials, please share them here.

[swng]

This one is about acetone being a solvent, especially of plastic materials:
http://www.benzworld.org/forums/w140...hlight=acetone