91 octain fuel

[cjackg]

Where the heck are you guys getting 91 Octane gas ??

All the gas stations I frequent have either 87, 89, or 93.

How's this for variety... There is a Smile Gas station on E.Brainerd Rd in Chattanooga TN that sells Non-Ethanol Gas in all of the following grades, all at the same pump: 93 92 90 89 87 !

 

[spyryder]

How's this for variety... There is a Smile Gas station on E.Brainerd Rd in Chattanooga TN that sells Non-Ethanol Gas in all of the following grades, all at the same pump: 93 92 90 89 87 !

That pump likely has a 'blend' valve:
http://science.howstuffworks.com/engineering/civil/gas-pump4.htm

 

[boborgera]

Where the heck are you guys getting 91 Octane gas ??

All the gas stations I frequent have either 87, 89, or 93.

Sunoco in Jersey among others. I avoid the numbers game and only use 93.hyea:

 

[cjackg]

That pump likely has a 'blend' valve:
http://science.howstuffworks.com/engineering/civil/gas-pump4.htm

"Octane Cocktail" Aint it wonderful !
It just keeps getting better & better...

 

[woodchuck]

Octane

Put 5 gallons of 91 octain fuel in my RTS other day and bike really seemed to run a lot smoother and it felt comfortable putting along in high gear at 4000rpms with two up which it has not been able to do since I have bought it. Last fill up used 89 grade not as smooth but better then 87 grade.Seems most on this board use 87 octain. Looks like i will have to stay at least 89 grade. Milage seems the same (29.4) no matter what fuel grade. Have others found the above true or am I the only nut in the group. JW Miller

Back in the 60's which was a long time ago Amaco had a white gas that we ran in our bikes. It would run a lot better and more power. What the octane was I don't know. But it boosted power.

 

[boborgera]

Back in the 60's which was a long time ago Amaco had a white gas that we ran in our bikes. It would run a lot better and more power. What the octane was I don't know. But it boosted power.

:thumbup::thumbup:
Remember it well, It was the only pump gas with out lead.
So campers would use it to cook with, and for lanterns in tents.
Also sparkplugs would last for ever, The problem was it cost 4/5 cents more a Gal, Back in the 50's/60's that was like your right arm.:shocked:

 

[Euripedes Neves]

gas mpg, my 2008 rs

Scotty..

As to MPG.. I only get 25 with a high side of 27 average Regardless of solo, solo with trailer, with teacher, or with teacher and trailer.

I was using 91 as the book calls for.. I have in the past two weeks changed to 87.

I found no difference in mileage nor performace. The engine sounds and runs the same.

My measurement of MPG is riding on expressways 90% at 70-75 mph. Rpm's being 5500-5800.

Yes... Wheeler will state I got 32 mpg once. However, we did not exceed 45 mpg for almost 80 miles and I did not leave 4th gear.. This has not been repeated ( 32 mpg ) since.

I use 89 and i have got 30 to 36 mlg going less 60mph, if i go on the interestat 70 to 80mph i get 30mpg. w/ my trailer loaded i get 28mpg. I got 25K mls, and i am very happy.:clap::ani29::yes:

 

[woodchuck]

91 octane

Put 5 gallons of 91 octain fuel in my RTS other day and bike really seemed to run a lot smoother and it felt comfortable putting along in high gear at 4000rpms with two up which it has not been able to do since I have bought it. Last fill up used 89 grade not as smooth but better then 87 grade.Seems most on this board use 87 octain. Looks like i will have to stay at least 89 grade. Milage seems the same (29.4) no matter what fuel grade. Have others found the above true or am I the only nut in the group. JW Miller

I am confused on why one has to run such a high octane in the new spyder.(91):dontknow:
According to what I read, my 09 spyder has 106 horsepower and I run 87 octane.
The new spyder only has 100 horsepower. The only difference is the throttle boby is smaller. Same engine.

 

[boborgera]

I am confused on why one has to run such a high octane in the new spyder.(91):dontknow:
According to what I read, my 09 spyder has 106 horsepower and I run 87 octane.
The new spyder only has 100 horsepower. The only difference is the throttle boby is smaller. Same engine.

hyea:
The new Spyder has a higher compression ratio.