gasoline?

B

brokenheadbrad

New member
What kind of gas should i run in 2012 XC 300? I used to go to the U-Pump-It to buy my fuel cuz it was the last station in my town that had separate hoses for different octane fuels. It went out of business and is currently being demolished. Now i've been going to blended pumps with 2 gas cans. I'll pump 2 gal into the first can to try and clear whatever gas was still in the hose then add what i believe to be 91 octane into my bike gas can. I've done this 4 or 5 times now and have 10 gallons of i don't know what octane in my garage. Does it matter what octane fuel i run in my bike? How about 100 octane av fuel? I can get 100 octane aviator fuel but it's leaded. Will leaded fuel help or hurt? Thx for any info.
 
I put a few gallons from the 91 octane pump in my car before filling my jug, my ec250 runs fine on 91 pump gas. Can you dump the extra gas in your car or truck ?
Does your bike ping, knock or rattle on pump gas? If it does you need race gas or a 50/50 mix of pump and race gas.
I wouldnt pay extra for race gas if my bike didnt need it.
I know nothing about running leaded gas.
 
thx for the reply Eric. I don't hear the engine detonating and it seems to run fine on 91 pump gas. I drive a diesel truck so I would rather not pour unleaded into it.
 
Eric said:
I put a few gallons from the 91 octane pump in my car before filling my jug, my ec250 runs fine on 91 pump gas. Can you dump the extra gas in your car or truck ?
Does your bike ping, knock or rattle on pump gas? If it does you need race gas or a 50/50 mix of pump and race gas.
I wouldnt pay extra for race gas if my bike didnt need it.
I know nothing about running leaded gas.
Click to expand...
I'm pretty fussy about where my fuel comes from. I get my gas from a station that does high vol sales(the fuel in the tanks doesn't sit in the tank more than a couple days). I run 91 octane with my premix...never an issue. I got gas once at an out of the way place that sold fuel at a much slower rate(burned crappy). May just be me, but seemed to make sense without any scientific backing.
 
Brad,
I try to run 91 or 93 octane fuel without ethanol when I can get it. I have run 91/93 with octane when I could not get non ethanol fuel. I have run 87 with ethanol when I was desperate and personally could not tell any difference. A friend of mine who is an excellent mechanic tells me that you shouldn't let fuel with ethanol stay in the carb for very long. It corrodes jets quickly. I'm sure there is a difference in fuel in different parts of the country but I haven't noticed a performance problem here in the south. You might since you're at a higher altitude.
Clay
 
Thx for the reply's. Here at 5000+ feet 91 is the highest octane at the normal pumps. Good call about the ethanol Clay. I'm going to search the net and see if i can find a station that sells non-ethanol gas.
 
Using a 50/50 mix of pump and race fuel is usually best( or 100% race fuel), but using Av gas is like going in "un-charted waters". We had a nice discussion on this some time ago. Av gas does have a slightly higher octane rating and it may help a few bikes run better but it is blended for aircraft not dirt bikes. Ethanol is a mixed bag, it works OK in cars( less emissions) but you're trying to use a product made for a Ford/Chevy/Toyota in a 2 stroke. Some bikes are OK with it and others aren't. One example that comes to mind, a 2004-07 Honda CR 250R. I've never owned one but it is my understanding they are very "fussy" about jetting and yet the same year 250 mx bike from Yamaha, Kawasaki, Suzuki can be dialed in w/o much problem. Don't know if this helps much, better off with some race fuel or a name brand octane booster. Jim
 
There isn't ethanol free pump gas anywhere near New Jersey. I've resorted to Startron treatment, seems to work OK. Some guys here have had crank seal issues on other bikes from the ethanol. What bothers me about the newer GGs is the sealed crank bearings. Undoubtably a test bed for future DI applications, but a bad idea IMO considering the fuel components they are exposed to.
 
iajim said:
Using a 50/50 mix of pump and race fuel is usually best( or 100% race fuel), but using Av gas is like going in "un-charted waters". We had a nice discussion on this some time ago. Av gas does have a slightly higher octane rating and it may help a few bikes run better but it is blended for aircraft not dirt bikes. Ethanol is a mixed bag, it works OK in cars( less emissions) but you're trying to use a product made for a Ford/Chevy/Toyota in a 2 stroke. Some bikes are OK with it and others aren't. One example that comes to mind, a 2004-07 Honda CR 250R. I've never owned one but it is my understanding they are very "fussy" about jetting and yet the same year 250 mx bike from Yamaha, Kawasaki, Suzuki can be dialed in w/o much problem. Don't know if this helps much, better off with some race fuel or a name brand octane booster. Jim
Click to expand...

In about '94 I had a barrel of VP c-12 race gas in the garage - my wife was pregnant and I had no money to spend to buy another and had a bunch of races coming up. I called VP and got hooked up with an engineer and asked him if it was better to mix in 100LL av gas or pump gas to "stretch it out". At first he wouldn't answer - then after I told him my situation and pressed him *hard* for an answer - he replied.... "100 Low Lead".

My experience is that mixing 100LL with pump gas works very well - In a five gallon can - 2 gallons of av gas and 3 gallons of premium pump e10 works well. It reduces the net amount of ethanol in the mix and it also bumps the octane - there is enough lead in the 100LL to boost the octane of the unleaded fuel. This is just like mixing premium leaded with unleaded regular did in the mid 1970s when unleaded regular was first introduced - you get something better than the sum of the parts.

Jeff
 
brokenheadbrad said:
good website jeff. Unfortunately none in my town (fort collins) and only 23 in the whole state of Colorado.:mad:
Click to expand...

There is a marina less than 20 minutes south of you. I have to drive nearly that far to get my "clear gas" (ethanol free gasoline). You are lucky - I am sure Glenn (GMP) would be happy to have a station that close - he has ZERO in his state.

I bought several 5 gallon steel jerry cans - I take one trip and fill them all up... I can mix with a little pump gas to stretch it out if I need to...

jeff
 
My Husky 125 jetting use to be very sensitive to gas quality. I started using Seafoam treatment with each tank and my bike runs fine now. It starts easier, runs cleanly, and I don't think about jetting anymore. In the Michigan area, all that we have is E10 mixed pump gas. While I could search out marinas and make special mixes, I didn't want the hassle of running out during a long ride or trip. So I decided to make 92 pump premium work for my bike and Seaform has been the best solution for me. IMHO.
 
MattR said:
My Husky 125 jetting use to be very sensitive to gas quality. I started using Seafoam treatment with each tank and my bike runs fine now. It starts easier, runs cleanly, and I don't think about jetting anymore. In the Michigan area, all that we have is E10 mixed pump gas. While I could search out marinas and make special mixes, I didn't want the hassle of running out during a long ride or trip. So I decided to make 92 pump premium work for my bike and Seaform has been the best solution for me. IMHO.
Click to expand...

The issue here is that the E10 is highly unstable - it goes "bad" extremely fast - the seafoam is stabilizing the fuel - as well as cleaning the jets for you...

The local fuel here, if I don't have it stored in a steel can with stabil in it - it goes bad in a matter of weeks. My air cooled XR and my little crf230 motard commuter bike are both particularly finicky - won't start if I leave that crap in it for a month or more. Drain the fuel and put fresh in and it fires right up.

I now run ethanol free gas in all my small engines (mower, pressure washer, etc.) and the bikes. To me, it's worth the drive and worth it to buy some steel cans to store it in so that I have a good supply of it. I also add a little stabil so that it stores well

Jeff
 
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