HIGH OCTANE FUELS - Page 3 - Toyota Yaris Forums

Yaris Hilton · 08-05-2009, 04:21 PM

Higher octane doesn't mean it's harder to burn, just that it's slower to autoignite when heated to a temperature where that can occur.

Preignition is different from detonation in that detonation occurs after the spark has fired, in the part of the fuel/air mixture that hasn't yet been reached by the expanding flame front from the spark. Preignition is caused by hot spots in the chamber igniting the fuel before the spark fires. High octane won't fix that.

marcus · 08-05-2009, 06:30 PM

i do higher octane only if im loading heavy stuff on a trip..

Marthos · 08-05-2009, 07:20 PM

Quote:

Originally Posted by Yaris Hilton

Higher octane doesn't mean it's harder to burn, just that it's slower to autoignite when heated to a temperature where that can occur.

Preignition is different from detonation in that detonation occurs after the spark has fired, in the part of the fuel/air mixture that hasn't yet been reached by the expanding flame front from the spark. Preignition is caused by hot spots in the chamber igniting the fuel before the spark fires. High octane won't fix that.

Its just the way it was explained to me years ago in Auto Tech.
laymens terms was what i was going for.

This is from a wiki

"The octane rating is a measure of the resistance of gasoline and other fuels to detonation (engine knocking) in spark-ignition internal combustion engines."

Changed that to preignition.

Yaris Hilton · 08-06-2009, 08:45 AM

Usually when you hear pinging, you're hearing detonation. If it's preignition, something's wrong with the engine that needs fixing fast.

RUFFSTUFF · 08-09-2009, 04:05 PM

http://theserviceadvisor.com/octane.htm

http://en.wikipedia.org/wiki/Octane_rating

Henry G. · 08-09-2009, 07:53 PM

There is so much opinion and mis-information in this thread its ridiculous. Yaris Hilton is the only one giving facts IMO. 40 years ago they made muscle cars that had 10.5:1 CR and they required 98 octane fuel or higher. I know, I had one, a 1970 Mercury Cougar with the 4V 351 Cleveland engine.
How is it that today's Yaris and many other cars can run the same CR and not ping on 87? Computers and electronic ignition systems, knock sensors and micro-processors that constantly change the ignition curve. Run what you want, 87 is probably fine for most Marvin Milktoast drivers here with this roller skate car. HOWEVER, ignoring the driving conditions, driver habits, engine loading, engine temp, outside temps and humidity and making another "youre just wasting your money 87 octane is fine" ad nasuem post is another way of making your self feel better about putting Valero crap gas in your ride. Please dont knock someone who puts a quality oil or fuel in their car, and we wont call you a cheap bastard who rationalizes his actions. Toyota and other manufacturers know if they advise mid grade and premium fuel use for a cheap car like this they will lose business from all the tightwads, think about it.

RUFFSTUFF · 08-09-2009, 08:07 PM

In regards to pump gas... Premium is not a "higher quality" than regular. Don't let the name fool you. The bottom line is if it doesn't knock or ping on 87 under your driving conditons then the investment in 93 or higher is a poor one.

Hate to say it but the Yaris IS a cheap car and I love mine after 1 week. It's just too bad that some people are obviously smart enough to recognize a great vehicle but get lost in the minor details.

Hey Henry, didn't your 40 year old muscle car run on leaded fuel?

Marthos · 08-09-2009, 08:57 PM

Quote:

Originally Posted by Henry G.

There is so much opinion and mis-information in this thread its ridiculous. Yaris Hilton is the only one giving facts IMO. 40 years ago they made muscle cars that had 10.5:1 CR and they required 98 octane fuel or higher. I know, I had one, a 1970 Mercury Cougar with the 4V 351 Cleveland engine.
How is it that today's Yaris and many other cars can run the same CR and not ping on 87? Computers and electronic ignition systems, knock sensors and micro-processors that constantly change the ignition curve. Run what you want, 87 is probably fine for most Marvin Milktoast drivers here with this roller skate car. HOWEVER, ignoring the driving conditions, driver habits, engine loading, engine temp, outside temps and humidity and making another "youre just wasting your money 87 octane is fine" ad nasuem post is another way of making your self feel better about putting Valero crap gas in your ride. Please dont knock someone who puts a quality oil or fuel in their car, and we wont call you a cheap bastard who rationalizes his actions. Toyota and other manufacturers know if they advise mid grade and premium fuel use for a cheap car like this they will lose business from all the tightwads, think about it.

Got any pics of that coug? My 3rd fav car!

Here is my 2nd Fav!

I have some experiance with super/98 Octane, this car needed it.

This car doesn't.

Henry G. · 08-12-2009, 10:18 PM

Quote:

Originally Posted by RUFFSTUFF

In regards to pump gas... Premium is not a "higher quality" than regular. Don't let the name fool you. The bottom line is if it doesn't knock or ping on 87 under your driving conditons then the investment in 93 or higher is a poor one.

Hate to say it but the Yaris IS a cheap car and I love mine after 1 week. It's just too bad that some people are obviously smart enough to recognize a great vehicle but get lost in the minor details.

Hey Henry, didn't your 40 year old muscle car run on leaded fuel?

Ruffy: I think you need to read the part about computers retarding ping before you hear it. Not hearing ping doesnt mean a damn thing. I would like anyone who knows what "ping" sounds like sound off if they have EVER heard their Yaris ping...
About Leaded fuel: Uh yeah thats all they had then. Whats your point, it was killing polar bears or something?
Not sure I would call .10 cents a gallon an investment. And yes there are some name brand gasolines that only put their top tier detergent/additive package in their premium...and in addition some top tier brands that have any decent additive package at all. But it appears it only takes one week to know everything there is about a new car unless I'm reading your post wrong.
I dont hate to say it...the Yaris is a CHEAP ASS CAR. But its also a damn good car drivetrain wise, worth that dime a gallon "investment". I hope I dont end up losing my house putting premium in my Yaris....

Marthos: I'll see if I can find a pic it was an XR7, fire engine red, with black vinyl top, a real looker...sweet Mo-Par BTW, 383?

RUFFSTUFF · 08-12-2009, 11:11 PM

*Comment withheld due to lack of interest.*

Yaris Hilton · 08-12-2009, 11:47 PM

Well yeah, there's a very slight ping I often hear from mine. If you're familiar with the sound and attuned to it, with ears that haven't been totally blasted out by loud music, you can hear it when the knock sensor does. It's nothing like the real knocking noise of damaging detonation.

Marthos · 08-14-2009, 02:00 AM

Quote:

Originally Posted by Henry G.

Marthos: I'll see if I can find a pic it was an XR7, fire engine red, with black vinyl top, a real looker...sweet Mo-Par BTW, 383?

Yes 383, 4-Speed, was my pops, he was the body man and i did the wrenching. Together we brought it back from the dead. We took turns driving, I was the only one who could pull away nice and slow without stalling, that car loved me!!! Pops passed and it got sold, 3 other brothers, we didnt wanna fight, mom got the money. I can still smell the rubber burning, and hear the old man laughing!

Henry G. · 08-14-2009, 11:22 PM

Quote:

Originally Posted by RUFFSTUFF

*Comment withheld due to lack of knowledge.*

Fixed.

RUFFSTUFF · 08-15-2009, 12:56 AM

Quote:

Originally Posted by Henry G.

Fixed.

This forum isn't bad. Only took me about a week to find the first total idiot. Congrats Henry G! It's good to see you can get some time away from taking loads for gas money to come join us here. Who needs dignity when you can suck a golf ball through a garden hose, right Henry?

Between your next "jobs," have someone read these links to you...

http://www.cartalk.com/content/featu...ium/myths.html

http://www.consumerenergycenter.org/...s_premium.html

http://www.pontiacstreetperformance....Mythsgas1.html

http://www.scientificamerican.com/ar...tion-premium-g

This is just a sample... Google has plenty more.

Henry G. · 08-15-2009, 04:01 PM

This forum is full of googlemasters now we can add another...
So let me get this right. I knocked you for lack of knowledge...but now I cant read, don't have a job, dont have any money because I spend 2 dollars and week on premium gas and apparently am a male prostitute? Your a class act.
Why dont you try something, and report unbiased results like I did. Christ you would think being thrifty is a virtue and spending any amount of money no matter how small is a sin, so what religion is that? Jehovahs Cheapskates? I put in premium and got a solid 2 mpg improvement. I dont care what you buy, see if kerosene will burn in that thing I think Wallyworld has a sale on it right now...
Actually I was hoping for no change so I wouldnt have a reason to buy premium. BTW I'm now up to 36 mpg...

RUFFSTUFF · 08-15-2009, 04:25 PM

Quote:

Originally Posted by Henry G.

...but now I cant read, don't have a job, dont have any money because I spend 2 dollars and week on premium gas and apparently am a male prostitute?

Wow, I guess that would make you pretty busy... and overwhelmed.

Quote:

Originally Posted by Henry G.

Why dont you try something, and report unbiased results like I did.

Maybe I missed something, but I'm pretty sure at no time before your quoted post in this thread did you post ANY results... In fact in your first post, you were calling people "cheap bastards".

Quote:

Originally Posted by Henry G.

...I think Wallyworld has a sale on it right now...

Thanks for the tip... I get a discount there. It's good to know people in high places.

Are we having fun yet?

RUFFSTUFF · 08-15-2009, 04:31 PM

Quote:

Originally Posted by Henry G.

This forum is full of googlemasters now we can add another...

That's GoogleMaster. Capitalization is important.

I'm going to pass on defending the use of references to support my opinion, if you happen to find one to support yours though, you may want to share it.

Maybe later we can get back on topic.

Henry G. · 08-15-2009, 06:13 PM

Responding to your own posts now? Youre a troll. And a sensitive one at that.
I'm amazed that a person of your obvious powers of web-surfing did see this thread I started in this very forum, that YOU replied to with the parroted ad naseum reply "youre just wasting your money" blah blah blah....

http://www.yarisworld.com/forums/showthread.php?t=20281

Lets get back to cars. If I send you a couple dollars will you try premium and report back the results? I imagine its pretty hot there in Georgia this time of year, and you must be using the A/C. Why not try it instead of bagging on someone who did?
With your multi-quoting ability and grammar super-powers I presume you are a troll on other forums as well.....TROLL. I guess that "cheap bastard" thing really cut you to the bone....
Maybe you can enlighten us on the vast experience you have had with your car in the 2 weeks you have owned it.

08-15-2009, 04:01 PM	#51
Henry G. Drives: 2008 Yaris HB Join Date: May 2009 Location: So Cal. Posts: 100	This forum is full of googlemasters now we can add another... So let me get this right. I knocked you for lack of knowledge...but now I cant read, don't have a job, dont have any money because I spend 2 dollars and week on premium gas and apparently am a male prostitute? Your a class act. Why dont you try something, and report unbiased results like I did. Christ you would think being thrifty is a virtue and spending any amount of money no matter how small is a sin, so what religion is that? Jehovahs Cheapskates? I put in premium and got a solid 2 mpg improvement. I dont care what you buy, see if kerosene will burn in that thing I think Wallyworld has a sale on it right now... Actually I was hoping for no change so I wouldnt have a reason to buy premium. BTW I'm now up to 36 mpg... Last edited by Henry G.; 08-15-2009 at 04:13 PM.

08-15-2009, 06:13 PM	#54
Henry G. Drives: 2008 Yaris HB Join Date: May 2009 Location: So Cal. Posts: 100	Responding to your own posts now? Youre a troll. And a sensitive one at that. I'm amazed that a person of your obvious powers of web-surfing did see this thread I started in this very forum, that YOU replied to with the parroted ad naseum reply "youre just wasting your money" blah blah blah.... http://www.yarisworld.com/forums/showthread.php?t=20281 Lets get back to cars. If I send you a couple dollars will you try premium and report back the results? I imagine its pretty hot there in Georgia this time of year, and you must be using the A/C. Why not try it instead of bagging on someone who did? With your multi-quoting ability and grammar super-powers I presume you are a troll on other forums as well.....TROLL. I guess that "cheap bastard" thing really cut you to the bone.... Maybe you can enlighten us on the vast experience you have had with your car in the 2 weeks you have owned it. Last edited by Henry G.; 08-15-2009 at 08:57 PM.

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08-05-2009, 04:21 PM	#37
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	Higher octane doesn't mean it's harder to burn, just that it's slower to autoignite when heated to a temperature where that can occur. Preignition is different from detonation in that detonation occurs after the spark has fired, in the part of the fuel/air mixture that hasn't yet been reached by the expanding flame front from the spark. Preignition is caused by hot spots in the chamber igniting the fuel before the spark fires. High octane won't fix that.

08-05-2009, 06:30 PM	#38
marcus toyota View User's Garage Drives: 2007 Yaris RS Blazed Join Date: Oct 2006 Location: toronto, canada Posts: 3,637	i do higher octane only if im loading heavy stuff on a trip..

08-06-2009, 08:45 AM	#40
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	Usually when you hear pinging, you're hearing detonation. If it's preignition, something's wrong with the engine that needs fixing fast.

08-09-2009, 04:05 PM	#41
RUFFSTUFF Banned Drives: 2009 TOYOTA YARIS SEDAN Join Date: Aug 2009 Location: KINGSLAND, GA Posts: 381	http://theserviceadvisor.com/octane.htm http://en.wikipedia.org/wiki/Octane_rating

08-09-2009, 07:53 PM	#42
Henry G. Drives: 2008 Yaris HB Join Date: May 2009 Location: So Cal. Posts: 100	There is so much opinion and mis-information in this thread its ridiculous. Yaris Hilton is the only one giving facts IMO. 40 years ago they made muscle cars that had 10.5:1 CR and they required 98 octane fuel or higher. I know, I had one, a 1970 Mercury Cougar with the 4V 351 Cleveland engine. How is it that today's Yaris and many other cars can run the same CR and not ping on 87? Computers and electronic ignition systems, knock sensors and micro-processors that constantly change the ignition curve. Run what you want, 87 is probably fine for most Marvin Milktoast drivers here with this roller skate car. HOWEVER, ignoring the driving conditions, driver habits, engine loading, engine temp, outside temps and humidity and making another "youre just wasting your money 87 octane is fine" ad nasuem post is another way of making your self feel better about putting Valero crap gas in your ride. Please dont knock someone who puts a quality oil or fuel in their car, and we wont call you a cheap bastard who rationalizes his actions. Toyota and other manufacturers know if they advise mid grade and premium fuel use for a cheap car like this they will lose business from all the tightwads, think about it.

08-09-2009, 08:07 PM	#43
RUFFSTUFF Banned Drives: 2009 TOYOTA YARIS SEDAN Join Date: Aug 2009 Location: KINGSLAND, GA Posts: 381	In regards to pump gas... Premium is not a "higher quality" than regular. Don't let the name fool you. The bottom line is if it doesn't knock or ping on 87 under your driving conditons then the investment in 93 or higher is a poor one. Hate to say it but the Yaris IS a cheap car and I love mine after 1 week. It's just too bad that some people are obviously smart enough to recognize a great vehicle but get lost in the minor details. Hey Henry, didn't your 40 year old muscle car run on leaded fuel?

08-12-2009, 11:11 PM	#46
RUFFSTUFF Banned Drives: 2009 TOYOTA YARIS SEDAN Join Date: Aug 2009 Location: KINGSLAND, GA Posts: 381	Comment withheld due to lack of interest.

08-12-2009, 11:47 PM	#47
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	Well yeah, there's a very slight ping I often hear from mine. If you're familiar with the sound and attuned to it, with ears that haven't been totally blasted out by loud music, you can hear it when the knock sensor does. It's nothing like the real knocking noise of damaging detonation.