[risky_analyst]

can someone explain the difference between RON and MON?

 

[Mister Dirt]

lol i can now add this to my i told ya so book.. in fact, ill print your page write up out so i can show people.. sometimes i hate being right.. nahhh.. good write up.

 

[Crip2Nite]

Thanx....I've been doing this research for 3 weeks now...getting all different answers and finally uncovered the real, down ro earth, gods honest truth about this whole premium or not mess!

 

[juni5]

Wow is this really true?..I was always under the impression that a compression ratios of 12.0 and above was on the verge of needing to run, or would benefit from using race fuel...I know in cars civics around if you run over 11.1 you pretty much gotta run race fuel..Now are we talking about just regular street riding or aggresive/track riding as well? I remember reading a roadracing world test article on horsepower gains on stock bikes (at least I think they were) while running VP MR9 and some other fuels...So what's that all about? If it's true then, awesome, more money in my pocket!

 

[OveRReV]

Wow is this really true?..I was always under the impression that a compression ratios of 12.0 and above was on the verge of needing to run, or would benefit from using race fuel...I know in cars civics around if you run over 11.1 you pretty much gotta run race fuel..Now are we talking about just regular street riding or aggresive/track riding as well? I remember reading a roadracing world test article on horsepower gains on stock bikes (at least I think they were) while running VP MR9 and some other fuels...So what's that all about? If it's true then, awesome, more money in my pocket!

dude our sportbikes can run 87MON or 93RON gasoline b'coz our 600cc engines have quite small pistons, small pistons have less area for the flame to travel once the sparkplug ignites the air/fuel mixture, bigger engines with larger piston surface area tend to detonate on the same grade of fuel we use with lower compression ratio. a gixxer1k uses a minimum of 90MON gasoline as opposed to 87MON on our 600RR, they both have nearly equal compression ratios but what was the difference? the gixxer1k has a bigger engine.

 

[juni5]

So what about the horsepower gains in the roadracing world test when using race gas? Dirt bikes have small pistons as well and run compression ratios of 12.0:1..And they benefit from running race gas..I don't know anyone who runs 87 in their dirt bike...

Sorry I'm hard headed

 

[parapuke]

VP race fuel MR9, what the big boys use is 87 octane. Of course it is oxygenated and leaded which makes a big difference.

 

[juni5]

Ah IC thankyou very much...case closed I guess..

 

[cojolio]

i filled up my tank with 87 and i think its running like crap...i dont know maybe its just me or the bike getting used to the new type of gas since i always used 93... but like at lower speeds it was ruffer to ride it
? Maybe its just me...(but im going back to 93 lol)

 

[crvlvr]

I don't agree with the the OP. First of all, we need to understand what the Octane Number we are taking about

RON - Research Octane Number -- usually 8-10 points higher than MON
MON - Motor Octane Number
PON (RON +MON/2) Pump Octane Number - usually 4-5 points higher than MON

For example PON of 91 = MON of 86 = RON of 97. PON is what is indicated on the pumps in the US.

Source: http://en.wikipedia.org/wiki/Octane_rating

Also, Octane rating has little to do with flame speed (which I agree is an important factor). Keep in mind the RR has a compression ratio of 12:1. While it is safe to use higher octane instead of lower octane. Vice versa could result in engine damage

http://www.faqs.org/faqs/autos/gasoline-faq/part3/section-1.html

 

[shock3rd]

The 2006 owners manual says 86 octane or higher. I Haven't though seen any noticable difference between cheap or higher priced in my bike.

 

[Huntstyle]

I don't agree with the the OP. First of all, we need to understand what the Octane Number we are taking about

RON - Research Octane Number -- usually 8-10 points higher than MON
MON - Motor Octane Number
PON (RON +MON/2) Pump Octane Number - usually 4-5 points higher than MON

For example PON of 91 = MON of 86 = RON of 97. PON is what is indicated on the pumps in the US.

Source: http://en.wikipedia.org/wiki/Octane_rating

Also, Octane rating has little to do with flame speed (which I agree is an important factor). Keep in mind the RR has a compression ratio of 12:1. While it is safe to use higher octane instead of lower octane. Vice versa could result in engine damage

http://www.faqs.org/faqs/autos/gasoline-faq/part3/section-1.html

So based on that, an RON of 91 would still be an 86 or 87 PON. Am I right? The bike says 91 RON. I filled up with 87 today, and didn't notice any difference, other than the fact it was about $1 less than normal.

 

[ccb7]

says 91 under the seat, but manual says 87. GO figure

 

[08-600-Double-R]

hmmm i tried 89 PON and 91 PON...haven't noticed a difference. in the back of my 2005 owners manual under the quick refernce guide it says "unleaded gasoline, pump octane number 86 or HIGHER" ....so blah use whatever the hell you want! lol

 

[mikespike2]

Hmm.. well if nobody's bike has blown up because of detonating (or maybe it has a knock sensor) then I don't see anything wrong with 87. It's what I use too.

 

[noisehr]

It doesn't say anything about using a specific octane. I was just looking at the manual because of this thread. In my manual (2006), it says unleaded 86 or higher. My opinion is, it really doesn't help much going to 91 or 93 (whichever premium is in your area), but I do not believe it would harm the engine either. And of course, this is with my vast knowledge of gasoline (kidding.. )

 

[Guest]

In a North American Honda Owners manuel, my guess is that they are assuming you know that your local pump uses the (R+M)/2 method for rating Octane. Anyone in the UK see anything different in their Owners Manual?

 

[KulSecHskY]

I'll stick with my premium it's not that much money for peace of mind. I also don't have a catalytic converter to worry about =P

I have this crazy theory that premium gas might be cleaner. As far as debris and other crap.

 

[bay_707]

I will never put 87 octane in my bike.

 

[Butters]

Why hasn't this thread been made a sticky yet?

http://www.600rr.net/vb/showthread.php?t=46907

Everyone always asks this question.