what octane gas to use? - TwoWheelForum: Motorcycle and Sportbike forums
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post #1 of 49 (permalink) Old 06-04-2006, 09:50 PM Thread Starter
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what octane gas to use?

hey GAS MAN i know this is probably your field of expertise so chime in...

i have a 98 900rr and have not gotten gas yet, i know with certain things you should not put a low grade in if it has been fed only higher grade so i was wondering what grade would be best for my bike? I am going to call the person i bought the bike from and ask what he used, but if he says something low like 87 should i continue to use that or step up to a higher grade? let me know
thanks
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post #2 of 49 (permalink) Old 06-04-2006, 09:52 PM
 
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91 octane or higher. No lower.
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post #3 of 49 (permalink) Old 06-04-2006, 09:55 PM
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It can't hurt to double check the owners manual, but I'd use 87 unless it pings. If the bike is stock it should run fine on the cheap stuff.

(its getting harder and harder to call gas "cheap stuff")

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post #4 of 49 (permalink) Old 06-04-2006, 10:40 PM
 
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Being a 900cc I am going to bet its supposed to use premium. I know my SV650 only required 87 octane, however the R1 must use Premium, most today's sportbikes require Premium, even the R6, GSXR600 etc.

Go with the premium since it's a 900cc.
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post #5 of 49 (permalink) Old 06-04-2006, 10:40 PM
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93 or higher in my 636, i can tell a differance with 92, its weird, but i swear it makes a differance



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post #6 of 49 (permalink) Old 06-04-2006, 10:41 PM
 
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I don't know for sure what the manual says but I have never put anything other than premium in my bikes. (my sport bikes anyway) I figure with that high of compression higer octane gas is better.
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post #7 of 49 (permalink) Old 06-04-2006, 11:19 PM
 
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Quote:
Originally Posted by Wockman
It can't hurt to double check the owners manual, but I'd use 87 unless it pings. If the bike is stock it should run fine on the cheap stuff.

(its getting harder and harder to call gas "cheap stuff")
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post #8 of 49 (permalink) Old 06-05-2006, 12:28 AM
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Quote:
Originally Posted by drewpy
93 or higher in my 636, i can tell a differance with 92, its weird, but i swear it makes a differance
That's right there is a difference... you wallet is lighter so your hp to weight ratio changed to show more power.


Quote:
Originally Posted by frostz28
I don't know for sure what the manual says but I have never put anything other than premium in my bikes. (my sport bikes anyway) I figure with that high of compression higer octane gas is better.
The higher compression is right on for the reason why you need the higher octane. It also is dierectly linked to the timing in your bike. The farther it is advanced the more octane you need. But if you go to far you will need to start putting in colder plugs as well. But that's a whole seperate ball of wax.

The best answer to this is...check your owners manual. I'm betting it will say 91 at least octane. However, you can acutally get more power from your bike with the least amount of octane possible without pre-ignition.

As Wockman said...
Quote:
Originally Posted by Wockman
It can't hurt to double check the owners manual, but I'd use 87 unless it pings. If the bike is stock it should run fine on the cheap stuff.



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post #9 of 49 (permalink) Old 06-05-2006, 02:35 AM
 
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Quote:
Originally Posted by Gas Man
The higher compression is right on for the reason why you need the higher octane.
Glad I didn't make a complete fool of myself by saying that. When it comes right down to it I don't know much about bikes so Im glad that my reasoning for that was correct.
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post #10 of 49 (permalink) Old 06-05-2006, 02:36 AM
 
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Low octane in a high compression engine might detonate sooner and screw the timing up. Use the premium. Don't be cheap when it comes to your bike, dude.
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post #11 of 49 (permalink) Old 06-05-2006, 07:52 AM
 
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Quote:
Originally Posted by DLITALIEN
Low octane in a high compression engine might detonate sooner and screw the timing up. Use the premium. Don't be cheap when it comes to your bike, dude.




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post #12 of 49 (permalink) Old 06-05-2006, 07:56 AM
 
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premium
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post #13 of 49 (permalink) Old 06-05-2006, 09:05 AM
 
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High compression engines tend to be at their peak with high octane fuels. 91 or better ONLY. which would you find more appealing, spending a few bucks more at the pump, or save those few bucks, and have a major engine failure of some kind?
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post #14 of 49 (permalink) Old 06-05-2006, 10:16 AM
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A good read... CLICKY

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post #15 of 49 (permalink) Old 06-05-2006, 10:20 AM
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Quote:
Originally Posted by Wockman
A good read... CLICKY
Good read!

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post #16 of 49 (permalink) Old 06-05-2006, 10:55 AM
 
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Quote:
Originally Posted by ZX1000
High compression engines tend to be at their peak with high octane fuels. 91 or better ONLY. which would you find more appealing, spending a few bucks more at the pump, or save those few bucks, and have a major engine failure of some kind?
It's really not a few bucks more. Maybe a buck and a half.
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post #17 of 49 (permalink) Old 06-05-2006, 10:56 AM
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I use 110LL from the airport.
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post #18 of 49 (permalink) Old 06-05-2006, 10:58 AM
 
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Originally Posted by jeeps84
Good read!
Yeah it is.
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post #19 of 49 (permalink) Old 06-05-2006, 10:59 AM
 
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read your manual...the manufacturers hire these people called engineers to design these things...they probably have a clue...I use the products spec'd in my owner's manual and the shop manual.
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post #20 of 49 (permalink) Old 06-05-2006, 10:59 AM
 
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Quote:
Originally Posted by ShanMan14
I use 110LL from the airport.
We put JP-8 (jet fuel) in one of our work trucks one time and it hauled ass. It's governed at 45 and it got up their a lot quicker. It was a diesel truck.
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