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Old 07-07-2011, 02:18 PM   #1
grae
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Default What octane

What octane should be run in a motorcycle. I have a 2007 Honda Shadow Sabre 1100 cc. My Harley ridng friend tells me to run the highest octane possible. Use racing fuel if you can get it. Since i live in US i guess the best is usually 93 octane. I saw a couple of responses for a smaller cc engine. I just want a general concensus.
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Old 07-07-2011, 03:44 PM   #2
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Reg should be fine on the sabre unless you want more detergent that some premium gas supplies. Owners manual will say what grade is recommended or the dealer but higher octane is to keep the gas from exploding before you want it to in high compression situations. If you put a turbo on your Sabre or really pimped the compression up then yes, more the better. But if you've left it stock reg should be fine unless otherwise stated by the manufacturer.
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Old 07-07-2011, 04:02 PM   #3
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Whatever the manufacturer says.

Usually Regular (87 octane R+M/2 method in the U.S., except for Colorado and other mountainous areas).

Anything more is a waste of money - but hey! It's YOUR money!
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Old 07-07-2011, 05:34 PM   #4
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http://www.motorcycle.com/how-to/wre...-gas-3417.html
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Old 07-07-2011, 06:47 PM   #5
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If it isn't pinging, the gas is ok in my opinion.
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Old 07-07-2011, 08:07 PM   #6
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Octane (as mentioned in the article) is only a measure of resistance to pre-detonation (knocking/pinging).


Do this: Run on a tank of 86 octane, then run on a tank of 93. I'll bet that you get better mileage on the 86. The reason is that often they use Ethanol to increase the octane of gasoline. Ethanol has a higher octane rating (much higher) but lower specific energy. So you need more Ethanol to equal the same amount of work as Gasoline.
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Old 07-08-2011, 05:55 AM   #7
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Quote:
Originally Posted by grae View Post
What octane should be run in a motorcycle.
You should use what the manufacturer tells you to use in your owner's manual. And if you don't have a manual, get one.

AND you should not listen to ANYTHING that Harley riders tell you.
We all know they are all just a bunch of posers !!

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Old 07-09-2011, 08:52 AM   #8
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Do you think he should use regular oil with the regular gas and only use synthetic oil with the high-test? What if he's using a car tire on the rear wheel?
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Old 07-09-2011, 02:03 PM   #9
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Quote:
Originally Posted by Morbo the Destroyer View Post
What if he's using a car tire on the rear wheel?
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