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#1 |
Join Date: Apr 2020
Posts: 19
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Apollo 250 92 octane or higher?
My bike says to use 92 octane or higher. I’m a bit confused. I can’t get anything over 91 lol.
Does it matter if I use 87 or 91? Will I see any improvements or should I stick to 87? |
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#2 |
Join Date: Jan 2018
Posts: 410
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It will run on 87. Just make sure it is ethanol free. DO NOT RUN ANY GAS WITH ETHANOL IN IT. You will probably have to search for it. I am lucky. In my area I have 2 stations that carry 90 octane ethanol free. It cost the same as premium gas with ethanol. I have never understood that. It is cheaper to make because they don't have to add the ethanol. Supply and demand I guess. At these stations I have noticed All landscapers and construction workers always get the ethanol free. They learned the hard way probably.
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2020 Kawasaki KLX300R, 2018 Yamaha TW200 If you want more of something, tax it less. If you want less of something, tax it more. |
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#4 | |
Join Date: Jan 2018
Posts: 410
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Quote:
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2020 Kawasaki KLX300R, 2018 Yamaha TW200 If you want more of something, tax it less. If you want less of something, tax it more. |
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#5 | |
Join Date: Mar 2008
Posts: 2,436
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Quote:
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#6 |
Join Date: Sep 2016
Location: Texas
Posts: 165
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You only see 91 in your location because of the altitude you are at.
Octane rating for engines is done at sea level. |
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#7 |
Join Date: Nov 2017
Location: Marseille, France -> Conakry, Guinea
Posts: 1,481
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That's incorrect. His altitude has nothing to do with their fuel octane recommendations. Engines are capable of running on lower octane at altitude. The reason that 91 octane is listed here is because they're quoting research octane number, like what is commonly used in China and Europe. The US measures a different way, thus our numbers appear lower. 87 (R+M/2) is roughly equivalent to 91 RON.
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#8 |
Join Date: Sep 2023
Posts: 1
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I'm running regular 87 octane in my nephew's Apollo Blazer and I'm going to try to run hi octane in the future. It seems like it pings just a bit at idle, but I bet it would go away with high octane.
This is close to sea level in NJ, FYI. |
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#9 |
Join Date: Nov 2022
Location: Pennsyltuckey
Posts: 309
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It's not actually pinging at idle, just making some typical engine noise. Try going up a long hill at low rpm and listen for ping or knock. Detonation is the concern and it occurs when the engine is under high load, not at idle. With the very low compression ratios that Chinese motorcycle engines use 87 octane should be fine.
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22 Templar 250 |
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#10 |
Join Date: Mar 2020
Posts: 153
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American 87 is the Chinese 91.
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#11 |
Join Date: Sep 2023
Location: Melbourne Australia
Posts: 5
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As noted, American 87 is approximately the same as 91-92 RON. The American number uses an average of static and dynamic octane ratings from when that mattered, the blends in modern fuels mean RON is just as accurate.
I am running 91 RON in my son's bike, but I am running an iridium plug, which is slightly colder than stock. While theoretically a higher octane fuel will give slightly less power we found it is not noticeable - I initially ran 98 as I didn't know what it was rated for or the compression ratio. I run my road going vehicles on E10, especially air-cooled, but never use it on off road or marine even with stabiliser. My experience is the stabiliser "wears out" and it gels, clogs, etc. If you suspect you have had some ethanol in there, try pouring a good slug of acetone in the tank - old racer's trick, it dissolves a lot of stuff, including recombining alcohol, raises octane rating, and it ignites more easily. |
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