Waste of money. Two stroke engines don't have enough
compression to require premium gas.
If you use the chainsaw frequently, regular gas is fine.
If you use it intermittantly then try to find ethanol-
free gas, since ethanol sitting in the carb will eventually
eat away the insides and you'll need a carb rebuild.
If you can, run it dry when you're done using it,
whichever kind of gas you use.
In Texas there is more differences in Premium and regular than just
higher obtain. Typically 3 trades of fuel. Regular, often with fewer
detergents and more alcohol. Premium, more detergents and often no
alcohol. Mid grade fuel comes from the regular and Premium tanks.
So If yo want to avoid alcohol in the fuel, which attracts moisture, buy
I started using Stabil in my gas can and my fuel does well for months on
end, from one season to the next. The label claims that it will keep
the gas good for 2 years, and now I believe it. Still a good idea to
run the carb/tank dry at the end of a season. I only do this however at
the end of the season. Some of my equipment started running badly until
I started treating the gas can about 3 years ago. Now all run
fine...even the Honda that I bought in the spring of 1987.
Same many places here. The "regular" gas is 87 minimum octane - may be
slightly higher with up to 10% hooch. The premium is a "tier 3"
gasoline of 91 octane and in the case of Shell (and some others) no
Mid-Grade is a mixer pump, blending the hooch-poluted regular with the
high end premium - which yields up to 5% hooch and 89 octane.
Typically differences in detergents are between brands,
not between fuel grades. The vendors would like you to
think there's extra "good stuff" in premium (especially
now that it costs $0.50 or more above regular), but
other than octane boosters it's generally not so.
I am also dubious that premium would be alcohol-free.
I suspect if it was, it would be prominently advertised,
and I haven't seen that anywhere.
Different strokes for different folk, John.
Saw Shell advertising ethanol free premium up in Wisconsin. Not so here
in Illinois (at least not in the NE corner of the state - down south
it's available in some areas).
I think, but not sure, that Shell's ethanol free was tied in to their
"V-Power" blend or somesuch
I'm inclined to think that "nitrogen enriched" stuff is all
just marketting blather.
If you want my opinion, the best gasoline additive is Chevron's
Techron. But I don't think there's much difference between
any of the top brands.
Same here - I think that's a legal requirement, and is the
same wording everywhere in the US.
Next time I'm in Texas I'll have to look at the pumps and see
if the premium is marked different (last time I got gas in TX
was at the Buck-ees north of Houston on US290, and I was so
overwhelmed at the size of it - must have been 100 pumps - I
didn't pay attention to that sort of detail).
On 12/29/2015 3:12 PM, firstname.lastname@example.org wrote:
This is true but to be clear Tier 1 is not strictly the premium fuel,
rather the brand. Exxon has always had detergents and additives but
only relatively recently has qualified as a Tier 1 provider.
The Top Tier standards must apply to all grades of gasoline that a
company sells, whether it is economy (low-octane) or premium
(high-octane). However, premium gasolines may contain even higher
levels of detergent additives.
That very well may be however it is only in the Premium grade Shell
gasoline. Even their web site indicates this.
Techron is not bad at all. I was selling Techron before it was added to
gasoline. I learned about Techron through General Motors, they were
selling it as a fuel additive to combat the injector contamination
issues that they were having in the 80's. And it worked well. It came
in a 16 or 32 oz bottle IIRC. It was only later on that Chevron began
marketing it with their gasoline in Texas.
Absolutely a requirement when they don't know which fuel you are going
to choose. It is a blanket statement that covers all the bases.
Mid grade is blended at the station pump.
On Mon, 28 Dec 2015 15:08:05 -0000 (UTC), John McCoy
Might be true in the USA, but the total additive package in tier 3
premium gas is significantly different than in the same brand's
Shell Canada has gone on record saying there WILL BE no ethanol in
their premium gasoline.
If you look at PurGas.org? the vast majority of stations selling
ethanol free gasoline sell only premium ethanol free gasoline. The
only major resellers of ethanol free regular are marinas.
Mogas for aircraft use is also ethsanol free premium. No Mogas STC
allows ethanol fuel.
On Sun, 27 Dec 2015 23:49:54 -0000 (UTC), John McCoy
Tell my Remington saw that. Theoretical is something north of 12:
effective is something around 10.
It'l rip your arm off if it doesn't start.
My old Partner, on the other hand is around 9:1 theoretical and
5.something effective. The little remington has more OOMPF than the
big partner. The partner would likely run on kerosene if you could get
it lit - the remington will overheat on regular gas, but runs great on
Makes a difference what oil you are running as well - and how much.
On 12/27/2015 8:41 PM, email@example.com wrote:
A shot of ether and the sucker starts like a champ.
I've had the same chain saw since around 1978. The first tree I cut up
it blew up. My neighbor, a farmer the first 20 years of life, owned a
two man auto repair shop the next 50 years, and a lawnmower repair shop
the next 25 years, told me my mistake was using the 50-1 chainsaw oil
mixture recommend by Sears. He said use regular 20w non-detergent in
something like 9-1 or 20-1, can't recall, it's written on my gas can in
the shed. He said it might smoke a bit, and be hard to start but it
will never freeze up. Arguing with a 95 year old dude that still worked
on small engines 9-9 6 days a week seemed silly, so I gave it a shot.
It was always hard to start, so didn't notice a difference, but learned
to use ether to get er running (even though I was often told ether would
hurt the engine)
I rebuilt the engine, took his advice, and now, almost 40 years later,
the saw still runs great. I haven't used it much lately, getting old,
but last I used it it still ran, and smoked like a champ...
Also, as far as premium gas in a chainsaw, my guess is once you dump oil
in the gas, it doesn't matter much.
Add Life to your Days not Days to your Life.
Doesn't need ether - it USUALLY starts on the first or second pull.
But if it decides to balk instead, it snaps back with fury!!!!. I
won't start it on a ladder or in a tree. Too dangerous if it "gets
Doesn';t seem to.
I tend to use 40:1 instead of 50:1 so it does smoke - but it is close
to 50 years old and has never been apart. And other than the extreme
high compression kickback, it is NOT hard to start. I run ethanol free
premium, and even after sitting for 2 years with a full (sealed) tank,
it started on the second pull.
If 93 octane drops to 87, think where 87 goes!!!! The more oil, the
lower the octane - one advantage of the lighter mixes.
And i remember having to settle for something like 71 octane because
it was all I could get - at $1.65 a liter - back in '74 in Livingstone
Zambia. The old '49 beetle didn't care, but the 204 Peugeot wasn't
happy untill I cranked the timing back. You could drive the stage 3
Mini Moke into the shop with the key turned off after you got it
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