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CBR 600F3 1995 - 1998 CBR 600F3 Forum

Fuel type?

Old 01-30-2010, 09:43 AM
njdjh2o's Avatar
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Posts: 271

Yes, 93 is harder to compress, I stand corrected.

I got my bike with 21,000 miles on the dash and don't know what the previous owner done. I know when I put 87 in my bike, I average 125 mile a tank, 93 I get about 140 out of a tank. Maybe I hate to say, I might have a lot of carbon in my engine, which is why MY bike run better on 93 than 87. My wife feels her bike run better with 91, then that is what she use.

Point is, these bike were built to run on 87 octane NEW!

Since these bike are second, some time third or fourth handers, you never know what has or has not been done to it, which make it runs better on different grade of octane than what is stated in the manual.

It all depends on the condition of the engine for the rider to choose what grade to use.
Old 01-30-2010, 11:00 AM
CTcbr929's Avatar
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Originally Posted by njdjh2o View Post
Nope I agree, I use use 93 in my bike and when I put in 87 it ran ****ty. Burn that out and run 93 always. High the octane the easier it is to ignite in the combusion chamber when give a greater push on the piston, which = to greater VOOM VOOM. Plus it also do burn cleaner, less carbon build up on the valve and piston head.
+1 on this... ive used 93 since day one and my bike runs well
Old 02-10-2010, 10:54 PM
AlexB98cbr's Avatar
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Posts: 22

110 octane...
Old 02-12-2010, 05:31 PM
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my bike hates 87. I started using 91 after the bike would stall on me and die. I threw in a can of seafoam and a full tank of 91 and it ran great. Then I ran out of gas one day, my friend came to the rescue with some 87, but my bike got f-ed up. So from now on I run 91 only.
Old 02-15-2010, 01:53 AM
BPWilson_F3's Avatar
Join Date: Feb 2010
Location: Vancouver, WA
Posts: 70

I've never been one to believe the high octane hype, mostly because i know its for high compression motors, but my bike just seems to run better on the stuff. And as for it being more expensive, 9 bucks a tank for premium i think i can afford.
Old 02-20-2010, 01:29 PM
EffThreeFyrBall's Avatar
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high octane also makes it so you can advance your ignition timing more without detonation. Advanced Timing = more HP
Old 02-20-2010, 02:06 PM
dyracuse's Avatar
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How many of us have ignition advance on an f3 though?
Old 02-20-2010, 05:34 PM
willduce's Avatar
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Location: northern il
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i run regular because thats all it needs and im cheap, but the good stuff smells alot better when u run it...i love the smell of burnt premium/high octane fuel
Old 02-20-2010, 07:25 PM
dyracuse's Avatar
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I think the smell you smell is unburnt gas, because the premium does not fully burn before it leaves, and honestly to everyone that thinks they need 91, try 89 for a while, if that works try 87, if that does not work go back to 89, I really can not see there being that much build up that it would require 91 or 93 since that is a huge change in compression ratio.
Old 02-20-2010, 07:50 PM
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Wrong these bike's were not made to run on 87. On all the manual's it says 91 or higher. They run bad based on 87 is to fast of a burn and needs to be more controlled hence high compression (11:5:1) I think it is. Here it is off from the manual. Also it doesn't have to always be high compression for octang either since advance timing from the factory will cause this too. Most bike manufacturers rather have you be safe with a higher grade fuel if it gets cold out since the air is more dense and cause effects.
Attached Thumbnails Fuel type?-100_0580.jpg  

Last edited by Krux; 02-20-2010 at 07:53 PM.

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