Sunoco 104 octane

[Mastermind]

So it wouldn't do much for the Dolmar 7900 you ported a muffler modded for me?

Sir no sir. 93 is as much as I'd recommend.

 

[Deets066]

Oxygenated fuel has benifits, but does it out weigh having more octane?

 

[Mastermind]

Oxygenated fuel has benifits, but does it out weigh having more octane?

I've never tried anything like that. I'm old, boring, and have bad gas.

 

[beaglebriar]

I've never tried anything like that. I'm old, boring, and have bad gas.

Old✓

Boring✓

Bad gas.... gonna have to take your word for it.

 

[Deets066]

I've never tried anything like that. I'm old, boring, and have bad gas.

It’s not worth running for anything but race. Even then, if it’s not quite right....

 

[rogue60]

With ALL or pump gas so crap down here now days it's rubbish I can't even seem to get a lawnmower to run any good on the crap.
I have found using avgas brings low compression Two strokes back to life they run how they used to when fuel was real fuel.
even with the higher octain they run ten times better running on real fuel/gas unlike the crap that you get at the pumps now days.

 

[Kenskip1]

I am sure that I will get feedback but todays saws are designed to run on regular 87/89 octane.Yes I have tried using the 93 super without ethanol and I could not notice a difference.The designers of the saws know what they are doing. I start and run all my saws every few months and have never had a problem.Note, if you keep a lid on the gas with ethanol so that it cannot absorb moisture,you should not have a issue. This is what I have been doing for years.

 

[jakethesnake]

I use the cheapest pump gas with decent oil at 32:1. I use oil with stabilizer I feel the extra oil in the gas helps level out the ethanol a bit. It’s whats convenient works fine for years. My saws look good inside.

 

[bwalker]

There's no benefit to running high octane like that.

Actually given the fact the fuel in question is oxygenated you will make more power with it. Useful for racing, but I cant see it for everday use given the low compression ratios of chainsaws.

 

[Al Smith]

They've made such a big deal out of gasoline which usually just amounts to talk laced with BS .Built ethanol plants hither and yon and created a glut on the stuff which should have been used for whiskey and cattle feed instead of high tech moonshine .It takes 40% more ethanol to produce the same amount of pure gasoline to get the same power .Never the less we are stuck with it .It certainly does not cause all the problems people squawk about though .
It might cause seals and carb parts to fail faster than straight gas but it can be dealt with .Some people think a dang chainsaw is like a fully restored 1953 Indian Chief motorcycle or a 1957 Chevy all numbers matching .They aren't,they are tools .
My two old Ferguson tractors,1965 Jeep CJ5 ,1946 John Deere A , John -Deere 1954 model 70 and 1954 Oliver OC-6 crawler are tools too and they do just fine on ethanol gasoline .I'm certainly not going to the air port or 90 miles north to lake Erie to find pure gasoline from a marina for heavens sake .

 

[Al Smith]

Okay now a little history most on this site aren't old enough to remember but I am .Sohio ,standard oil of Ohio had a premium gasoline labeled as Boron .It was guaranteed to prevent fuel line freeze up which was a common event in the northern areas because the temps could drop to 20 below .The "secret " ingredient was ethanol and that was 45 -50 years ago so it's nothing new .
Then came vapor recovery systems on modern automotive engines and the problem went away .

 

[rogue60]

I've never had any problems running cheap pump fuel with ethanol in it in chainsaws with it melting crap like fuel lines carb diagrams or anything like that.
Now the two things that I myself have had problems with running the crap pump gas here is the saws are down on power gutless and on a hot summers day hard starting.
Running it in my two stroke mower in summer after say 20-30min of use it would lean out and rev to the moon! after shutting it down I'd have to let it cool for 20-30 min before the fuel would cool and stop boiling and actually run again through the clear fuel line I put on to help diagnose what was going on.
Anyways as an experiment I tried avgas easy for me to get there are 44's of it at at work.
It's then I realized how down on power they where and yes I know avgas is the wrong fuel for low compression Two Strokes but there was a massive pick up in power in all my T2 gear one saw in particular felt in hand like it had double the power. I'm not saying it's a race gas and gives ported saw power I'm talking back to stated stock power that's how down on power they where.
Now I don't go out of my way to get avgas it was an experiment that showed me just how bad the pump has has gotten here.
The pick up in power I put down to avgas is closer to a real fuel chainsaws used to run on then the crap pump fuel they sell today.
If your saws don't seem to run like they used to years ago get your hands on something closer to what real fuel used to be even if its high octain and see the difference yourself I was shocked myself just how crap the fuel they pass off as fuel to us is today.
I can only imagine how good they would run running the correct octain fuel like the good old Super we used to have here years ago back when fuel was fuel.

This is just my experience with fuel from my Indian servo I get crap pump gas from.

 

[Mastermind]

I've never had any problems running cheap pump fuel with ethanol in it in chainsaws with it melting crap like fuel lines carb diagrams or anything like that.
Now the two things that I myself have had problems with running the crap pump gas here is the saws are down on power gutless and on a hot summers day hard starting.
Running it in my two stroke mower in summer after say 20-30min use and after shutting it down I'd have to let it cool for 20-30 min before the fuel would cool and actually run again through the clear fuel line I put on to help diagnose what was going on.
Anyways as an experiment I tried avgas easy for me to get there are 44's of it at at work.
It's then I realized how down on power they where and yes I know avgas is the wrong fuel for low compression Two Strokes but there was a massive pick up in power in all my T2 gear one saw in particular felt in hand like it had double the power. I'm not saying it's a race gas and gives ported saw power I'm talking back to stated stock power that's how down on power they where.
Now I don't go out of my way to get avgas it was an experiment that showed me just how bad the pump has has gotten here.
The pick up in power I put down to avgas is closer to a real fuel chainsaws used to run on then the crap pump fuel they sell today.
If your saws don't seem to run like they used to years ago get your hands on something closer to what real fuel used to be even if its high octain and see the difference yourself I was shocked myself just how crap the fuel they pass off as fuel to us is today.
I can only imagine how good they would run running the correct octain fuel like the good old Super we used to have here years ago back when fuel was fuel.

This is just my experience with fuel from my Indian servo I get crap pump gas from.

Great post sir.

 

[67L36Driver]

Summer of ‘70 we ran Sunoco 260 in the circle track car. 301” SB w/12.5:1.

Other than that have had scant use for high octane fuel.

Most old saws would likely run well on Coleman fuel. [emoji848]

 

[shadco]

I've never tried anything like that. I'm old, boring, and have bad gas.

TMI

.

 

[Larry B]

I run regular 10% ethanol gas in my Ferris mower. 184 LoBoy, all 4 stroke small engines. 10 hp old Bunton, 12 hp Sears ST12, 3.5 hp snow blower, 5hp generator, 12hp generator, 11hp chipper, 3hp edger, 6hp tiller. I run the small engines dry for the off season. As long as I don't leave the gas in long term I don't have any problems. On the 2 stroke stuff I run E free just because I can get it 6 miles up the road. Always run them dry for storage and never have any probs. I have someone bring me something with fuel problems every couple days. Usually because they stored whatever it is with fuel in it. Or they use last years gas in that 5 gal can. A guy brought me a saw that wouldn't start and he said it had fresh gas in it. Poured the S&!t out and would not light with a torch. 99% of fuel issues are caused by users. Dirty gas cans, removing fuel filters, old gas, old rotten fuel lines, leaving fuel in carb during storage. Of course I am not complaining. Bad fuel and bad storage habits makes me money. I need a sign in my shop that says "well it ran fine last year"

 

[bwalker]

I'll run ethanol 87 in all my four cycle stuff, except for storage. For storage I run the engine dry and fill the tank full with avgas. That stuff stores forever.
For two cycle engines I will not use ethanol at all. The biggest problem with it is it doesnt vaporize in the crankcase and as a result washes some of the oil off bearings, pistons etc. Some of my two cycle motors have engines that are pretty well built motors with BMEP's much higher than a saw so it matters. In OPE I still wont use ethanol, although given the disposable nature and cheap cost of OPE I can see why some people do.

 

[Al Smith]

I usually buy gasoline 20-25 gallons at a time .If the two cycle gas gets too old I just dump it in the tractor or Jeep because they don't care what you feed them .This time of the year 2 gallons of saw gas will last me a couple of weeks . .The only time I've ever boiled the gas in the tank was in the Colorado mountains in altitudes over 9,000 feet .That high you've got to lean them out, air is kind of thin .Saw doesn't run right and neither do people .

 

[Larry B]

I have 6 five gallon cans I usually fill with regular and another for E free. Like you say the Ferris and LoBoy don't care if the gas is 6 mo ths old. The funniest thing is the old motor home in the barn has been setting for untouched for almost 3 years. Regular gas with no stabilizer went to start it figuring the entire fuel system trashed. It started right up. '89 P30 chassis with a carbureted 454. Never would have thought that.

 

[bwalker]

I have 6 five gallon cans I usually fill with regular and another for E free. Like you say the Ferris and LoBoy don't care if the gas is 6 mo ths old. The funniest thing is the old motor home in the barn has been setting for untouched for almost 3 years. Regular gas with no stabilizer went to start it figuring the entire fuel system trashed. It started right up. '89 P30 chassis with a carbureted 454. Never would have thought that.

Ethanol isnt as big of a deal with four cycle engines as they dont have raw fuel sitting in their crank cases like a two stroke does. Since ethanol attracts moisture it's not easy to figure out where corrosion is an issue. Using ester based oils only makes this worse.
Like wise the carb orifices, lines, etc on a four cycle big block carb are much bigger and tougher to foul up vs a chainsaw carb.