91 Grade fuel?

[llimonce]

here in venezuela we have 91 and 95 octane only .. the yaris runs with any of these without problems

[N3misiS]

Ive done the same tests here in SA, now I do not know if the settings for the ECU are diffrent here than they are there but I have Ran 93, 95, and 98 fuel...

I travled 400Km with each for a work trip wich they pay for fuel, He he...
and 93 fuel burnt so much faster and after I had to clen out my motor, 95 gave me better response and aceleration, much better, also my range inproved form 524Km's to around 680Km, then 98, it did not make a diffrance at all, on these conditions I ran Shell
and nothing else, we pay around 25C a litre more for 95 but those are our Octain levels we use...

It was a 1Kr-Fe, so I dont know what other people have felt but this was my test...

[Kaotic Lazagna]

Also keep in mind that driving conditions will never be the same (i.e. tailwind, headwind, crosswinds), so you can travel the same route each day and have varying results, even with the same grade fuel.

[N3misiS]

True, but these conditions where the same more or less... it was in a day, 12 Hours driving that is....

Even in normall driving the presence of change is there...

[LittleRed]

I have experimented with 93, 91, 89 and 87 octane..without a doubt 91 is the magic number...my yaris flies with 91 octane...i also put in an aftermarket intake AEM..witch..makes a little noise...but i did notice a big difference in horsepower and torque ..especially in the top end ..it no longer drags with the A/C on...and now when i mash the throttle..it goes faster...and doesnt bog down.. now little red..is a little red rocket......putting fuel system cleaners in it really helps too... mine will vibrate at idle when it needs to be cleaned out... carbon is a by-product of combustion and it must be cleaned as well as injectors do...cleaning the carbon out keeps it running like new , which mine does at 90K .. and im still getting 40+mpg...now to tighten the suspension

[Reeves360]

Also another thing to keep in mind is that the higher your elevation the higher the octane level will be on the different grades of gas. I live at sea level regular grade gas has an octane level of 87.

If you have less oxygen in the air that your engine is mixing with gas then you will need a higher octane to produce the same sized explosion.

Hope this helps out.

[Morgan]

I feel dumber reading this thread...

[06silveryaris]

i run the regulr at texaco but sometimes i even get the no name cheap stuff but once i put in 93 and my car ran as fast as a honda hahaha

[LittleRed]

My yaris runs much better on 91 0ctane gas...any higher octane and it gets slower again....it must retard the timing on higher octane...my car feels like im dragging an anchor behind me on 87 gas... putting in fuel system cleaners really helps too... carbon is a by-product of combustion and must be cleaned as well as injectors do...mine will vibrate at idle when it needs to be cleaned.... it smooths back out when i put a cleaner through it ... mine runs like new at 90K... Cleaning out the carbon is the key to having an efficient engine..

[mazilla]

[Bluevitz-rs]

^ I clicked don't run but nothing happened

[str8Yaris]

Run on 89 octane.... it feels good I get better acceleration from it than 87. I also ran 101... LOL but just a couple of gallons for when I race..... feels like I have a rocket under my ass.... lmao.... I'm up grading to 91 when I'm supercharged ..

[why?]

Originally Posted by mazilla

that is total win.

[Youngbleeze]

try and fill up at least 3-4times in a row with premium and you will notice better response... i ONLY put premium in my car.

[kargoboy]

Originally Posted by Morgan

I feel dumber reading this thread...

And I just remembered why I don't get over here very often any more...