| Author | Message | ||
     Rageonthedl |
Just want to see what kind of gas you all run Me sunoco 94oct every day and on Fri, sat and on race days i use cam 2 race gas 110oct<----runs realy good | ||
| Biofilter  |
I also use Sunoco 94 oct | ||
| Lpd22 |
Sunoco 94 | ||
| Briz31  |
Shell Optimax, 98 octane unleaded BP Ultimate, 98 octane unleaded Brisbane Australia | ||
| Cyclonecharlie |
That Cam II is alittle rough on your O2 sensor isn't it? (leaded) Later Charlie | ||
| Rageonthedl |
naw i have now run into any problems...yet, its not like i use it every day so i dont think any lead will build up | ||
| Klink |
I run F&L 111 octane with a mixture of 91 pump gas, only on occasion | ||
| Rageonthedl |
i have used sunoco 100 and 110 oct unleaded..dont like it at all | ||
| Slaughter  |
Leaded can start affecting the oxy sensor quicker than you might think. Buddy of mine put a gallon of leftover VP 114 octane into his X1 and a tank later, the bike was really starting to get rough. (the sesor WAS already pretty high mileage - but STILL) There are plenty of unleaded race fuels. VP C-10 works really well for a bike needing unleaded and 95+ octane because of compression. I don't have oxy sensors so am switching to leaded for the next drum. Too high an octane can lose power if you don't have the compression to burn it | ||
| Rageonthedl |
My XB12 has over 12k on it and i have had no problems at all and i ride the bike hard, on a fri or sat night ill go threw 2 tanks of gas just cruzing and racing japs light to light. the biggest reason for using the Cam2 is cuz i can get it at Speedway gas station right out the pump. | ||
| Nedwreck  |
Best I can get at the gas station is 93 octane. Haven't given much thought to octane boosters. Bob | ||
| Cataract2 |
Whatever the highest pump octane that have. normally 93 or 94. Doesn't matter to me so long as it's not old. | ||
| Rubberdown  |
Whatever premium 93 is available. No problems yet. | ||
| Kowpow225 |
I run nitromethane and a supercharger ran by my shifter foot. Whew! | ||
| Cataract2 |
So Kowpow, what number to your put down with that? BTW, where do you go to fill up with nitromethane?  | ||
| Hkwan |
I get to use the very wonderful 91 octane in Northern CA/ | ||
| Fullpower  |
my XB12 is only about 10 to 1 compression, doesnt seem to mind 87 octane unleaded. runs just fine on regular. dont know what you guys are smokin, but octane does NOT equal horsepower. | ||
| Svo1023  |
i'm with fullpower... i do run 93 though..smoke on dudes | ||
| Johnnylunchbox |
I haven't put a lot of miles on my XB12R yet, but I'll tell you what. I'll run the lowest octane I can without pinging. I'm not gonna waste money on Octane I don't need. Just my two cents. | ||
| Newxb9er  |
You guys would be surprised to know what that "90's" Octane really is. Just because it says "91" doesn't mean it is actually that high. It just means that is an average from the test they used. They take the Motor value, and the Research value, and the averages of the two are what they put on the pump. M0+R=Octane. M is Motor Rating with a test engine done at 300 degrees air inlet temp. with high loads on a dyno, R is the Research rating with a motor having 125 degrees air inlet temp and mild loads. They average both and get a Road Octane. So, understand that the value's produced are only as good as the test! | ||
| Charlieboy6649  |
I used to think that higher octane meant more potent. I was surprised to learn that higher octane gas burned slower. It was explained to me that with high compression and/or advanced timing etc. you'd want the flame front to burn more slowly/evenly. Is that right? Heck I run 91 cuz that's what the manual says... (Message edited by charlieboy6649 on January 26, 2005) | ||
| Cataract2 |
Heck I run 91 cuz that's what the manual says... Bingo, manual says to run it so that's what I do. Not like this bike burns gas like bums to a ham sandwich. I figure I save enough $ on gas so a few cents more won't hurt me with the bike. | ||
| Newxb9er |
The higher the Octane rating, the higher the compression before the gas spontaneously ignites. The goal is to prevent the gas from spontaneously igniting before the spark ignites the next round. If you run low octane gas, on high compression engines, you run the risk of it "knocking". The piston will compress the gas and boom it ignites, then the spark ignites after. This is why race engines use higher octane gas, because of the high compression ratio. Running race gas in a standard compression motor doesn't do anything for it. Just a waste of money. Buell recommends 91 because if you run 87, you run the risk of having the fuel actually lower than that(see previous post) and the motor knocking. If 87 from "Brand A" works for you, use it. Just don't expect "Brand B" 87 Octane to work the same. BTW, an Octane is a Hydrocarbon Chain with eight Carbon Atoms chained together. 87 Octane is 87% Octane 13% Heptane(7 carbon atoms chained up). Obviously different manufacturers mix other additives with the fuel, changing the mixture. Class is dismissed!!  (Message edited by NewXB9er on January 26, 2005) | ||
| Johnnylunchbox |
I run 87 Octane without pinging in my Concours which is a high compression engine. The difference with the Concours is that it is also a all aluminum engine which dissipates heat faster and I believe lessens the chance of pre-ignition. I'm sure an engineer will come along soon to enlighten me if I'm wrong. | ||
| Jaredkuper  |
Sometimes the best I can get here is 89 octane, but I'll fill up with whatever premium is available. No problems with any type of gas so far, I just avoid the places that are being refilled by a tanker. | ||
| Newxb9er |
?? Every Gas station is refilled by a tanker truck. No gas station that I know of has a pipe from the refinery to the pumps! And I have about 6+ refinery's within 20 miles of me! | ||
| Metalstorm  |
I think he means that if a station is being filled (from a tanker yes) when he shows up he'll go to a different station rather than use the pump while the tanker is filling the tanks and mixing the bottom sludge around. I'm the same way. If my normal station is being refilled I'll go somewhere else or come back later after the the crud in the tanks have settled back to the bottom. | ||
| BadS1  |
The crud as you call it won't come up anyways.As long as the stations are changing there filters at there pumps and they do cause the EPA makes sure of it.Sometimes though you can get gas that has water or some condensation in it. | ||
| Blake |
Johnny, Your Buell engine is also all aluminum. The reason that some high compression engines can tolerate lower octane is due to various and combined factors such as... 1. Theoretical compression ratio not being representative of actual compression ratio, or in other words poor volumetric efficiency (cylinder filling efficiency). 2. Smaller combustion chambers can be less prone to pre-ignition. 3. Engines operating at higher speeds can be less prone to pre-ignition 4. Engines that are less efficient and utilize a rich mixture are less prone to predetonation, but they must compensate by having catalytic converters and suffer poor fuel efficiency. 5. Less performance oriented engines may be less susceptible to predetonation. | ||
| Johnnylunchbox |
Blake - thanks for the enlightenment. I have only put about 100 miles on my new/used XB before the snows came. I have yet to begin the winter reading of the service manual. I had no idea the engine was all aluminum. I fell like an idiot LOL. | ||
| Blake |
That happens to me all the time. And rest assured, there are those in this discussion forum who will never let either of us forget it.  On #2 above, I meant to clarify further that the smaller diameter piston and combustion chamber are able to more effectively dissipate heat. |
