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Discussion Starter · #1 ·
I got a lesson in gas and octane today...just curious to know what people run in their bikes.

Anyone?
 

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Nothing but the best.
93 OCTANE.

My question is.......
Y use anything else?
It's about a .20 cent price difference
We are talking about a tank that hold about 2.5 gallons.
So lets say it cost a dollar or two more.
Remember you paid a lot extra to have a DUCATI than thos Gixxer boys.
So let her drink the BEST.
 

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In Montana, our reg is only 85, and 89 is as good as it gets for pump gas.

Any one try VP U4 yet? Dyno run or track day?
I have to buy 5 gal for my last hillclimb and will only use 2 gal.
 

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the good stuff

smeelge said:
94 Octane
Smeegle,

Where are you buying 94 octane? I thought the Feds outlawed everything over 93. I used to run Cam2, (102 ocatne), in my Kaw, but I'm not sure they still sell it. And we used to go to the local airport and buy airplane fuel for the bikes, (high ocatane also, over 100, I don't recall exactly how much), but I haven't tried that in some years either.

Are you buying 94 octane in the USA?

Elton
 

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Sunoco still sells 94 oct in Ohio, but stations
are few and far between compared with BP,
Shell, Speedway, etc. which only carry 92/93.
 

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Discussion Starter · #10 · (Edited)
Motorsports

Well I spent some time with my techs after hours yesterday. Took a long ride up to my dealer with full gear and a backpack to grab a few things they had for me. They were both getting their bikes prepped for track days and one for a race next weekend. Mind you this is a guy who builds race bikes for other people including himself...he got just as much hp tuning my stock engine as another did with race pistons/valve job/porting job.

Turns out that they recommend I get down in octane as much as I can. Definitely 89 but 87 if I don't get pinging. The bike will run better with more power and less carbon deposits. My buddy's 1098 runs great on 91 and he might start 89. I tried 89 on the way home, fine. My bike currently has a full tank of 87 in it.

I won't get too far into trying to explain it but here goes...you want the purest fuel you can for a lower compression engine provided it doesn't detonate - or ping. (My original "headcase" bike with 13.5:1 pistons required 93) Because of the additives in higher octane fuels they build up carbon deposits and slow the bike down. (the octane prevents the pinging and knocking and there are more additives to clean the deposits I guess?) My mechanic ran 93 in his 749R race bike only once and found there to be "a shitload" of carbon deposits in there. They did a test on different fuels on another bike and the bike had literally one more hp on lower octane gas. (remember these are race junkies...one more hp or one less lb mean a lot) And I know what you're going to say, like I did..."why is higher octane marketed as better?" Hmmm...the oil companies' profits will tell you that one. And "why is race gas so high in octane?" Well it's a completely different type of fuel and there are different kinds of octane measurements: http://en.wikipedia.org/wiki/Octane_rating

So unless your engine requires higher octane (my German rides always had "min 91" inside the filler door), you should experiment and go as low as possible in anything you drive/ride. The 1098s have been proven to run on 91, the jury is still out on whether they can run on 89 but probably can. Right now my bike runs the nuts on 87. Oh and by the way, you can use Chevron Techron (sp?) to clean out the carbon deposits...just mix it properly and you'll be fine. You can also help clean them out by romping the shit out of the bike every now and then too! :D

I know that I didn't explain that completely right because I probably only absorbed 3/4 of it...but the bottom line is that guys building, repairing, and racing bikes for many years are reputable in my eyes.
 

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Discussion Starter · #12 · (Edited)
P.S. The reason why I posed it as a question is because I wasn't sure whether most of you knew that and I was in the minority or if everyone thought they were doing their bikes good with higher octane...
 

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Discussion Starter · #13 ·
Yup

Hence oxygenated fuels...but of course those eat away at your motor so it's good to understand it before getting into it too much. I'm happy to know this stuff now!

ducati996mono said:
octane does not equal horsepower, Oxygen makes HP!
 

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Discussion Starter · #15 ·
Sunoco

is my preferred station, but they got rid of all the 94 here. But of course I don't miss it now that I know what's up!

They also sell CAM2 here, but only in select places like near the dragways etc.

mrinflux said:
Smeegle,

Where are you buying 94 octane? I thought the Feds outlawed everything over 93. I used to run Cam2, (102 ocatne), in my Kaw, but I'm not sure they still sell it. And we used to go to the local airport and buy airplane fuel for the bikes, (high ocatane also, over 100, I don't recall exactly how much), but I haven't tried that in some years either.

Are you buying 94 octane in the USA?

Elton
 

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Discussion Starter · #16 ·
So nobody to dispute or reinforce these claims huh? I didn't think peeps would be as stumped as me but I guess so...although it's counterintuitive I believe it and my bike feels great on 87. Not sure if it's better or if it's psychological, but it might just be so. I'll be running some Techron through it to clean it out too. By the way, if anyone is going to take my word for this (doubtful), the bike will probably not run great on Techron...but once it's burned through it should provide a noticeable difference if you've been running higher octane than you've needed to be.
 

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NewDuc,
I am with you, use only as much octane as needed to pervent knock, the rest cost you power.

From www.vpracingfuels.com/vp_01_fuels.html

U4TM
Used in stock and modified 4-stroke applications, as well as stock 2-strokes. Makes up to 6% more power than pump gas and any basic nonoxygenated racing fuel. Passes fuel rules for AMA amateur racing, and is also perfect for club level racing, CCS, WERA and AFM.

• Color: Clear
• Oxygenated: Yes
• Motor Octane: 92
• Specific Gravity: .718 at 60° F
NEW! U4.2TM
The latest generation of our U4 based fuels, this fuel is a direct pour-in replacement for U4 with little to no jetting changes required - +2 main jets and +2 pilot jets at the most. Makes power equivalent to U4 with no sticky residue and a less pungent odor. U4.2 passes AMA amateur fuel rules and is perfect for club level racing, CCS, WERA and AFM. U4.2 makes up to 6% more power than pump gas.

• Color: Blue
• Oxygenated: Yes
• Motor Octane: 102
• Specific Gravity: .784 at 60° F





U4e
Developed for those states that restrict the use of MTBE in fuels. Will work well in the same applications as U4, with comparable power increases.

• Color: Pink
• Oxygenated: Yes
• Motor Octane: 93
• Specific Gravity: .718 at 60° F
 

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Discussion Starter · #18 ·
Ahaa...

Glad someone out there could corroborate to some degree. I'm not about to go out and grab the VP stuff for my street machine, but I have heard great things about it. Eventually who knows, maybe I'll need it...but for now it will be good old 87!

Stimacsays said:
NewDuc,
I am with you, use only as much octane as needed to pervent knock, the rest cost you power.

From www.vpracingfuels.com/vp_01_fuels.html

U4TM
Used in stock and modified 4-stroke applications, as well as stock 2-strokes. Makes up to 6% more power than pump gas and any basic nonoxygenated racing fuel. Passes fuel rules for AMA amateur racing, and is also perfect for club level racing, CCS, WERA and AFM.

• Color: Clear
• Oxygenated: Yes
• Motor Octane: 92
• Specific Gravity: .718 at 60° F
NEW! U4.2TM
The latest generation of our U4 based fuels, this fuel is a direct pour-in replacement for U4 with little to no jetting changes required - +2 main jets and +2 pilot jets at the most. Makes power equivalent to U4 with no sticky residue and a less pungent odor. U4.2 passes AMA amateur fuel rules and is perfect for club level racing, CCS, WERA and AFM. U4.2 makes up to 6% more power than pump gas.

• Color: Blue
• Oxygenated: Yes
• Motor Octane: 102
• Specific Gravity: .784 at 60° F





U4e
Developed for those states that restrict the use of MTBE in fuels. Will work well in the same applications as U4, with comparable power increases.

• Color: Pink
• Oxygenated: Yes
• Motor Octane: 93
• Specific Gravity: .718 at 60° F
 

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Yes, I use it in my 900 Ninja pro hillclimb bike, for the 6% more power. and mix %50 with hi octane race gas for hi comp 2 strokes.
 

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It's funny, were talking fuel additives which i started a thread about earlier
but no one wanted to discuss. The ones that did reply poo-poo'd the idea.
Anyway, here's some stuff i was wondering about, this example adds 37%
(claimed) oxygen to the fuel mixture.
 
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