Anyone ever use 87 octane?
Anyone ever use 87 octane?
I used 87 octane in my bike this weekend and it ran like crap. I'd like to blame the gas, but can it really make that big of a diffrrenece?
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Not an expert but the octane rating is more or less a measure of how stable the fuel is , so a higher octane fuel will not ignite as easily under pressure as a lower octane fuel this is why higher compression ratios require higher octane levels. The knocking that comes with low octane fuels and high compression ratios is actually the fuel exploding under pressure as it is compressed before the piston comes to the top and before the plug ever fires this is why you feel a loss of power,the energy of the rotating crank/flywheel is being used up fighting the preignition that is trying to push the piston down . Again I'm not an expert but this is what I understand from the reading I have done and the experiences I've had.
As I understood it, the higher the octane the longer the fuel burnt. And low octane caused pinging becuase the fuel flaired quickly before the piston got far enough into the down stroke. ANd High octane delivered a more even explosion..
Anyways, the overal lesson I believe is, 87 octane may make your bike run like doodie....
Anyways, the overal lesson I believe is, 87 octane may make your bike run like doodie....
The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.