OK, now I run the highest grade of gas I can purchase at the pump for my chainsaw, but my question is, are you sure you are getting the highest grade gas when you pay for it, I got to thinking about it the other day, you have someone in front of you buy the lowest grade gas then you pull up and buy a gallon of the highest grade into the gas tank for your saw, my question is if you only buy one gallon of gas wouldn't you still only be getting the low grade that is still in the hose?
Chainsaw gas
- Thread starter lostone
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NWCS
Addicted to ArboristSite
you know.. thats an interesting question! hose wont hold a gallon.. but it probly holds enough to make your one gal of prem gas into mid grade.. never thought of that one.. so what you need to do is follow around the people buying the prem.. and pay for mid grade! LOL get yourself some mid-prem 
MacDaddy
Addicted to ArboristSite
What you do is buy 50 gallons of ethyl and the dillution factor wont count
GASoline71
Mr. Nice Guy
Never gave a thought about it before. Good thinkin' lostone.
Guess you could put a bucks worth of gas into the tank of your truck and then fill your can.
Gary
Guess you could put a bucks worth of gas into the tank of your truck and then fill your can.
Gary
GASoline71
Mr. Nice Guy
Me too, so nevermind. It was the thought that counts. 
You could put a gallon into a can for your lawn mower before filling the saw can to purge the mid grade or regular to get the premium. Also frequent places where they sell a decent volume (of premium not just regular) to ensure the fuel is fresh and to make sure you're getting the highest octane possible.
shtoink
ArboristSite Member
Maybe a bottle of that octane booster or you couold find a local airport and buy some aircraft fuel. I do not know much on the aircraft fuel, to be honest. I had only heard about it being of excelent quality, I just don't know if it'll run hotter or make the saw explode.
Just a thought...
Just a thought...
It will acutally make the saw run cooler as higher octane fuel burns more slowly than lower octane fuel does, and is less prone to detonation/preignition. It will not hurt your saw, but if the octane is too high you may actually see reduced performance as the compression ratio and porting of the saw may not be aggressive enough for the higher octane fuel.
2Coilinveins
Former Member
Avgas is good stuff. Do a search for 100LL, you'll come up with lots. I'm thinking about switching my small engined stuff to 100LL for this very reason. Sometimes my saws run every day all day, but they can sit for months at a time too, and I rarely know when that'll happen ahead of time. Sta-bil doesn't seem to work nearly as well as it should, I still notice degradation after only a few weeks. Avgas on the other hand......my generator(full of 100LL) was sitting for four months and still started on the first pull. Anybody run their saws exclusively on 100LL?
Do a search for 100LL, you'll come up with lots. I'm thinking about switching my small engined stuff to 100LL for this very reason. Sometimes my saws run every day all day, but they can sit for months at a time too, and I rarely know when that'll happen ahead of time. Sta-bil doesn't seem to work nearly as well as it should, I still notice degradation after only a few weeks. Avgas on the other hand......my generator(full of 100LL) was sitting for four months and still started on the first pull. Anybody run their saws exclusively on 100LL?
Bob Wright
Addicted to ArboristSite
Next time you get gas, take a container and pull the trigger on the pump before you turn it on just to see how much comes out...Bob
SawTroll
Information Collector
Try alkylate fuel (Aspen etc.). It burns cooler and cleaner than dino fuel, and is better both for your health and the environment.It is premixed 1:50 with synthetic oil, and can be stored quite some time without deteriorating.
CNYCountry
ArboristSite Operative
lostone said:
I thought about this too. I try to use a station that has a separate hose for hi-test. Either way I pump a gallon or two in the car/truck first to make sure it's fresh and hi-test. But I'm picky anyway.
CNYCountry
ArboristSite Operative
TimberPig said:
Obviously you can tell if a station is selling a lot of regular by the number of vehicles you see there but how do you tell if it sells a lot of hi-test? I have been wondering this myself for a while.
CNYCountry
ArboristSite Operative
shtoink said:
Just know that most octane booster is not very effective. They say it raises it 10 points, what they're calling a point is .1 octane, so it raises it one octane number. It's even in fine print on the package. Plus that stuff they put in the outlaw additive is cancer causing.
I think aircraft fuel is leaded fuel. That's why the octane number is so high, the lead boosts it like crazy.
CNYCountry
ArboristSite Operative
SawTroll said:
It is premixed 1:50 with synthetic oil, and can be stored quite some time without deteriorating.
Is this available in the US?
av gas
Just go to the airport and get some avgas. It has a little lead. But the amount is so small it won't hurt anything. Also you don't have to worry whats been in the hose before since it usually comes from one tank which is only 100ll. Lastly, I heard someone say they had something sit for 5 years with av gas in it, and it started right up.
Just go to the airport and get some avgas. It has a little lead. But the amount is so small it won't hurt anything. Also you don't have to worry whats been in the hose before since it usually comes from one tank which is only 100ll. Lastly, I heard someone say they had something sit for 5 years with av gas in it, and it started right up.
Bob Wright
Addicted to ArboristSite
Alkylate fuel is started out from "dino fuel". After the crude oil is seperated and sent to other parts of the refinery, the vapors from different processes and some C3's-C4's (propane) are sent to an Alky unit for mixing there. I work in a refinery and we make it everyday. We use it for a blendstock for gasoline....Bob
bvaught
ArboristSite Operative
2Coilinveins said:Avgas is good stuff.
Yep, Avgas is the best deal going in high quality gasoline. I wont reiterate all of the things I know/belive here because of all my previous postings. The best quality as far as small engines are concerned is just how long it lasts before going bad. An example was an airplane I found that had been sitting for 8 years, the tanks had evaporated all but about 5 gallons but there was no residue in the tank and the remaining gas + some new stuff (the old wasnt drained) flew the new owner (against my recommendations) home. No carb cleaning, no new plugs, nothing.... just a jump start, air in the dry rotted tires, a ferry permit, and away he went, and survived.
Another good quality is that you guys concerned with heat will like... lead is a great conductor at high temps. Im not sure what this will do for a 2 stroke, but it is especially important for helping transfer heat to the cylinder head through the valve in a 4 stroke.
