Premium Gas

[churp]

Gotta be the the why.........couldn't be serious!!!!

[Black Yaris]

Originally Posted by churp

Gotta be the the why.........couldn't be serious!!!!

What? Please edit, that does not make sense

[acrbill]

Originally Posted by Black Yaris

What? Please edit, that does not make sence

WTF is sence? That makes no sense.

I keed I keed.

[Black Yaris]

I bet those that are saying higher octane fuel does not give ou better MPG have never tried it... You will bash it every wich way and sideways, but untill you try it yourself, or as bill stated with the correct diag equipment stop bashing it, because you don't know.

[static808]

damn kaotic, look what you done started?? its right up there with the synth vs. dino debate. makes for fun reading though...

--B

[Kaotic Lazagna]

Originally Posted by static808

damn kaotic, look what you done started?? its right up there with the synth vs. dino debate. makes for fun reading though...

--B

lol...would have never thought i could start all this.

[static808]

Originally Posted by Kaotic Lazagna

lol...would have never thought i could start all this.

we need to keep you out of the UN. you mean well, but you'll be starting wars by accident!!

--B

[Kaotic Lazagna]

hahaha, the United Nations...hmmm, perhaps, i might start WWIII if i join the UN. lol...

[marcus]

well i have been switching from prem to reg... so far i got more mileage with the prem then again that could also be driving habit as well..but its about 10-30 km difference for about 38 liters of gas..

here:

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...

[Kaotic Lazagna]

hey, i never said that. hahaha...why is my name highlighted and not jdium?

but yeah, this thread was brought back from the dead. well, i used premium again and got less mpg. but i know that's because i've been using the a/c more. personally, i think i'm just going to stick regular.

[eTiMaGo]

maybe because it would turn potential buyers away from the car, you don't usually associate a modern economy car with premium gasoline... Just a guess anyway! I'm gonna try higher octane fuel just for the heck of it for my next tank...

[njyaris]

just my two cents ... i just bought my YARIS a week ago and I LOVE IT .. therefore i use 93 octane .. now does this change anything .. ofcoarse it does .. even if it's only perception .. since my perception is in favor for better gas milage and higher performance i tend to drive a little harder and faster .. just my two cents

[jdium]

Originally Posted by njyaris

just my two cents ... i just bought my YARIS a week ago and I LOVE IT .. therefore i use 93 octane .. now does this change anything .. ofcoarse it does .. even if it's only perception .. since my perception is in favor for better gas milage and higher performance i tend to drive a little harder and faster .. just my two cents

Your perception is for better gas mileage so you drive harder??? That's counter productive...

Like I stated above. The higher mileage being noted is IMO a placebo type effect. You think higher octane will help, thus it does.

If requiring higher octane would turn away potential buyers, why not atleast tell them what everyone in here is saying? Increased octane = increased mpg? Cuz it's not true...

[smokinyaris]

so do you guys feel up with premium or regular............

[jdium]

Originally Posted by smokinyaris

so do you guys feel up with premium or regular............

I feel up my girlfriend sometimes

I fill up with regular, the cheapest stuff I can find...

[forpinks]

Go buy a "Maximum Boost" book and it will tell you that a higher octane gas will give you more power compared to lower octane gas.

there is a comparison on the N/A and Turbo there really is a big difference especially if your running RPMs higher than 4500 on N/A... The turbo with high octane gas is damn more powerful than low octane.

Also the 106HP (not high performance? I know.) is achieved using high grade high octane gasoline for testing (Since Japan don't have anything lower than 93 octane they even have 120-125 octane) the engine power will drop to 100flywheel HP when you use 87 gas and it will make more gunk to the engine because of the slight combustion difference even with the knock sensors, remember the 1NZ-FE is japan made and tested so It should run 90+octane and will get 51MPG elsewhere except US (may be possible with acetone) which don't have anything higher than 93 basic fuel 100 octane cost like 4.30 vs 3.30 91...

(It's new here in the USA and Toyota USA wouldn't put the 91 reccomended fuel since it will hurt sales...)

Hope this helps!!!

[jdium]

Originally Posted by forpinks

Go buy a "Maximum Boost" book and it will tell you that a higher octane gas will give you more power compared to lower octane gas.

there is a comparison on the N/A and Turbo there really is a big difference especially if your running RPMs higher than 4500 on N/A... The turbo with high octane gas is damn more powerful than low octane.

Also the 106HP (not high performance? I know.) is achieved using high grade high octane gasoline for testing (Since Japan don't have anything lower than 93 octane they even have 120-125 octane) the engine power will drop to 100flywheel HP when you use 87 gas and it will make more gunk to the engine because of the slight combustion difference even with the knock sensors, remember the 1NZ-FE is japan made and tested so It should run 90+octane and will get 51MPG elsewhere except US (may be possible with acetone) which don't have anything higher than 93 basic fuel 100 octane cost like 4.30 vs 3.30 91...

(It's new here in the USA and Toyota USA wouldn't put the 91 reccomended fuel since it will hurt sales...)

Hope this helps!!!

Ignorance is bliss eh? Higher octane will NOT give you more power in a Yaris. Go buy some dyno time if you can't believe me. It will NOT give you higher mpg either. Put the car on jack stands, and idle a tank away of each if you can't believe me either.

On a turbo car, higher octane allows more boost, thus higher hp.

Knock sensors have nothing to do with engine "gunk" buildup.

If it was possible for the Yaris to get 51 mpg in the U.S., it would. Why would Toyota not want a car that destroys every other car in its class? Try 51 kpg maybe.

The Yaris is sold in America. I think the Toyota engineers are smarter than us.

[churp]

Originally Posted by jdium

Ignorance is bliss eh? ......
On a turbo car, higher octane allows more boost, thus higher hp.

...... I think the Toyota engineers are smarter than us.

I'm sure the Toyota engineers aren't any dumber than us. That is why they say the Yaris run's with 87 octane, and that is why cars have had ECU's installed for the last few decades....don't you believe there is a reason...it's not because they cost a lot. They allow the timing to be retarded in a load situation to prevent knocking with the high compression engines (above 9 to 1 compression) in a load situation like maintaining 60-70 mph up a steep hill while using 87 octane.....this is not the optimum timing for power or gas milage but it keeps the engine from self destructing.

My 53 Buick I used to have, had no timing marks. The shop manual said to said to set timing by turning the distributer until it ran good, then test drive by accelerating or going up a hill. If there was a knock go back and retard the timing,then repeat until only a very faint knock was heard. This is fine and dandy until you got a batch of poor gas, then it would knock like crazy. You could increase milage by advancing timing (set according to the gas you used) and driving consertively. ECU's have changed this to the better, but 'good' gas does work.

During slow acceleration or maintaining speed on flat land the ECU allows the optimum timing because knock isn't present (even with 87 octane).....most hypers drive in this condition 99.9% of the time while the common everyday driver is in this condition 95% (guesstimate at maximum). So theoreticaly, scientifically, or any other way you think about it....the very concientious driver sees no gain from higher octane, the common driver may see better milage on a small fraction of their driving, and the leadfoot would see the best gains. Granted this is a small percentage gain over a very small percentage of a persons driving....but it is a gain.