2013 cbr250r running better on 89 octane. - Honda CBR250R Forum : Honda CBR 250 Forums
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post #1 of 24 Old 07-02-2014, 08:15 AM Thread Starter
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Red face 2013 cbr250r running better on 89 octane.

High every one I'm not new to this forum I have been looking on here your over a year at pros and cons about my bike (CBR250R) it's the best at what I want and need it to do. I just hit 8500 miles and had a new back tire and inspection done. Before that I was reading thread on here about gas I've all way run high test my last two tanks I've run 89 (shell) I'm getting better response threw every gear and better gas mileage. What I read on there was that this bike was made for low test. I JUST REALY WANT TO SEE IF IM THE ONLY ONE EXPERIENCE THIS. THANK YOU ALL FOR YOUR TIME
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post #2 of 24 Old 07-02-2014, 08:23 AM
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There are numerous posts here about octane, so I won't go into it, but if you'll run regular gas, as the owners manual recommends, you'll find it runs even better.

"A man who carries a cat by the tail learns something he can learn in no other way." Mark Twain
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post #3 of 24 Old 07-02-2014, 10:43 AM
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my old cbr 250 with 45k kilos ran better with 95. There was about a 1.0mm-1.5 mm layer of carbon on the piston when i had a look. The layer of carbon build up increased the compression ratio, better utilizing 95 octane.

my new cbr 250 with 4k kilos (when i bought it) runs better with 91.

both got worse mileage with 95.

old bike was faster than new bike.
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post #4 of 24 Old 07-02-2014, 06:34 PM
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Without dyno numbers it's all speculation in my book.
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post #5 of 24 Old 07-02-2014, 10:57 PM
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Is there a PDF online for the North American manual? The only one I can find is in English but I don't think it's for NA. It also says to use 91 octane or better.

I bought my 2011 used. Asked about the owner's manual but the PO couldn't find it.

Thanks.
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post #6 of 24 Old 07-03-2014, 12:16 AM
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91ron [usa 86-7pon/aki] at least equal to
98ron, first mistakenly used and compared
by this experienced road motorcyclist..

later used 95ron emergency fill one tank
[to avoid ethanol] deliberately feeling for
any differences, but nothing really..
back onto 91ron no ethanol and again
no real difference in performance in
various conditions including suburban
traffic, back streets and freeway..

addition of lv evoII slip-on exhaust
also no startling difference beyond
slight hp/torque increase and crisper
exit responses from corners[?]

higher anti-knock index fuels in this
10.7:1 compression ratio engine
are not necessary or better
in terms of combustion..

what you pay extra for is additives,
and the label 'premium'..

still, if you think it will be 'better'
then it will be, on some level..
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post #7 of 24 Old 07-03-2014, 06:19 AM
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Quote:
Originally Posted by beefsalad View Post
Without dyno numbers it's all speculation in my book.
you dont need a dyno when one bike can break 155kph sitting up and the other one cant unless you crouch.
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post #8 of 24 Old 07-03-2014, 08:55 AM
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What does your owners manual say?

.




Sent from my mobile phone while driving, waiting for a vigilante Motovlogger to star in his own train wreck.

Last edited by Aufitt; 07-03-2014 at 08:57 AM.
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post #9 of 24 Old 07-03-2014, 10:08 AM
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If you're using high-octane fuel in a bike that only requires regular with fuel prices rising the way they have been this week, you either need your head examined or you've bought into oil company advertising that was disproven long ago.
If the oil industry had the same restrictions and burden of proof on advertising claims that the FDA has on prescription drugs this wouldn't still be an issue in 2014.
At least most of the false claims of better performance from fuel additives were put to rest some time ago, but this "regular vs. super" discussion just never dies, probably because it keeps popping up on discussion forums like this on a regular basis regardless of what we've learned about fuels over many years.
People and the environment were suspected of being seriously poisoned by lead additives in fuel in the 1920, but it took until 1986 for the federal government to finally ban the stuff.
Hopefully one day the facts about using high-octane gas in engines that don't require it will catch up with the rumors that continue to circulate.
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post #10 of 24 Old 07-03-2014, 04:22 PM
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Quote:
Originally Posted by shisoshin View Post
91ron [usa 86-7pon/aki]

what you pay extra for is additives,
and the label 'premium'..
Regular gas and Premium gas from the same station have the same amount of additives/detergents. So unless the engine needs a higher octane to prevent detonation, there's no other benefits at all from using it.

Tis better to be thought a fool and remain silent, than to open one's mouth and remove all doubt.
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