All the gasoline here, regardless of grade, is E-10 gasahol. It doesn't
last as long in storage as 100% gasoline. So for 2-cycle fuel (which I
don't use a lot of) I've started using a shotglass when I mix it. The
shotglass is graduated at .5, 1.0, and 1.5 ounces. I mix 1.5 ounces of
good quality 2-cycle oil with .55 gallons of 89 octane gasoline for a
50:1 mix (it's just a little rich.) I don't add any Stabil, but when
it's 2 or 3 months old I pour whatever is left in the 2-cycle gas can
into my truck. Then I mix a fresh batch next time I need some.
I got tired of mixing up a whole gallon at a time and having it go
stale. Then I used it anyway, and it would eventually gum up my
I'm currently using Castrol (or maybe it's Penzoil) 100:1 rated TC oil
in a quart bottle. When that runs out, I may switch to QuickSilver PWC
(from Mercury Marine) synthetic oil -- the TC stuff, not TC-W3.
Now if I could just come up with a good method of remembering when I
last filled all my gas cans, so I know how old the gasoline is. (do you
think a blackboard in the garage would work?) I use Stabil in the
6-gallon cans for the generator, and dump them in the truck and refill
about twice a year. It's the little cans that I can't keep track of.
BTW, I buy one 2-gallon can of 91+ octane Premium gasoline in the spring
for the first tank or two of gas in the mower and tiller (etc.) They
seem to start easier that way. When that can is empty, I switch to
Regular for the rest of the season. By then they are either running
good, or they are not going to run good 'til I get them tuned-up. ;)
Too much oil in the mix is killing your engine. It causes excessive
carbon build up which will eventually break the rings and cause other
Walmart sells what looks like a large plastic hypodermic syringe for
accurately mixing small quantities.
Also note that "marine" two stroke oil is not interchangeable with the
stuff for air cooled engines, which run hotter. Different
characteristics for different operating temps.
I've got some big syringes, but the shotglass is easier to keep track of :-)
Mercury Marine is just the company name. Their "Quicksilver PWC" oil is
designed for air-cooled engines (it even says not to use it if your
engine needs TCW3), and the synthetic is rated JASO "FD" and ISO
I just wonder if I could use very high grade oil at 100:1 even tho' my
saws and weed eater manuals all say to mix it 50:1 (actually, they say
to use 32:1 unless I use Echo brand oil; I ignore that part and use good
oil.) I may one ounce to a half gallon and see how that works. (64:1)
These are expensive very-high-reving engines, especially the big
chainsaw, and I'd hate to burn one up.
As soon as I hit <Enter> I realized that I mistyped that; the ISO rating
should have been GD (there's not an E yet), and actually should be fully
spelled out "ISO-L-EGD". But there's more: I've tried to verify the
rating on this oil, in case I just read too much into the "synthetic"
part. and now I can't find any spec sheets anywhere. I've written to
Mercury but I haven't gotten a reply yet (and doubt that I will.)
It seems that most 2-cycle oil repackagers don't want you to be able to
compare their products, so they don't spec them any more specific than
TC vs. TC-W and TCW3.
87 Octane will start better than 91 (although you probably can't tell the
difference). The higher the Octane, the greater the ignition point.
So-called "premium" gasoline was developed to prevent premature ignition in
I don't think gasahol is less stable but it is more prone to absorbing
moisture and too much water would cause separation. Addition of oil
would only add to the problem.
I see no need to worry about gas stored for less than a year unless it
is exposed to a lot of moisture and air.
Air/oxidation is what causes gas to gel. Gas should be stored in
filled, tightly sealed containers.
For my generator and in the generator itself, I add 2 years worth of
Stabil. After two years, the gas goes into my car and lawnmower. I
have a piece of masking tape on the cans with the date purchased.
Interesting idea about the premium gas. It may have extra carb
cleaners. In my Lawnboy, I found it best to use their 2 cycle oil as
it probably has detergents for this. I had been using a premium brand
of 2 cycle oil but was needing frequent carburator cleaning. Before
switching back to Lawnboy oil, I cleaned up the carb by adding cleaner
to the gas.
Near the end of the grass cutting season, I add Stabil to the gas and
leave the mower full. It is a good idea to start up any engine with
gas at least every 6 months as there may be evaporation in the
carburator causing blockage. This happened to me last year with my
snow thrower. Then I read in the manual not to use gasahol.
Alcohol increase the solvent power of gasoline which has been a real
PITA to everybody.
Why not use Stabil? I mix one gallon of fuel for the weed wacker and put
stabil in it. Sometimes it lasts more than a season with no issues. I
put it in the lawnmower and snowblower and neither has ever had trouble
starting at the beginning if their season.
For 20 years, I've been using a small soda bottle, a syringe, and
Originally, my intention was to shorten the required shelf life by
Soda bottles seal tightly, which means I don't lose volatiles or draw in
oxygen and water vapor. Concerned about reliability, I've always stored
the bottles outside. I've never had a bottle crack. In my experience,
a bottle will last years. Eventually, the seal in the cap goes bad.
With a transparent bottle, I don't have to remember if I've added oil.
It's easy to carry, easy to see how much is left, and easy to pour.
At first I used a 1-liter bottle. Now I use a 591ml bottle with a
magic-marker line for 500ml. Even full, it has 18% head space so it can
warm up without much pressure.
With a syringe, I can measure oil more precisely than with a glass. Not
much oil is left on the walls, and it's internal, where it won't gather
dirt. Because oil is viscous, a syringe needs big passages.
I make fewer mistakes with easy calculations, and working with ml makes
calculations easy. 500 ml at 50:1? I suck up 10 ml of oil with my
syringe and squirt it into the bottle.
You put gasoline in BOTTLES? You're gonna DIE!
Bottles have been decreed by your betters as absolutely UNSUITABLE as
containers for gasoline! They are dangerous! It is against the laws of God
Several people are going to have trouble sleeping tonight worrying that you
may live in their town.
I like approved gasoline containers. They resist bursting from being
struck. Their appearance warns of the contents. They even let some
people get away with pouring gas on flames. I watched the gentleman
next door pour gas from a 2-1/2 gallon can onto a trash fire. He's a
I'm leery of them indoors or in vehicles because they aren't always
leak proof if knocked over and don't necessarily hold fumes.
If I transport gasoline or keep it in my ventilated garage, it's in
If I mix 500ml in a bottle, I'll immediately pour some into a tank. So
I have perhaps 250ml. I stow it outdoors in a spot where it will be
protected from accidental damage and a spill won't mean a fire hazard.
I've always kept an eye on the condition of bottles because a small
spill would mean a small amount of environmental damage. I've never had
a spill. I'd probably spill more than 250ml a year trying to pour
2-cycle mix from approved containers into little gas tanks.
I hope you have it clearly and obviously labelled. My
grandfather (long since dead) used to use a quart whiskey
bottle for gasoline for his well pump. The bottle was
labelled in ounces. He remarked one time hoping no one drank
out of that bottle.
With glass and plain gasoline, I can imagine the danger. It may be hard
to smell what's in a rigid bottle, and somebody wanting a gulp of warm
liquor may not want to smell it.
I keep it on a beam in a shed that's open on three sides. Kids couldn't
Suppose an adult spots it and has a sudden hankering for half a bottle
of warm soda that could be years old. If he takes it down, the first
thing he notices is that the plastic cap is grimy from being opened and
closed with oily hands. The he notices that the fluid is dark blue,
If he still wants a drink, it would be hard to get the short-necked,
flexible bottle to his lips without smelling fresh gasoline.
Somebody who drank from that bottle would probably also drink from the
fuel tank of a string trimmer, thinking the manufacturer was thoughtful
to attach a canteen for thirsty gardeners.
This is quite frightening. I am writing my congressman right
now, demanding that legislation be passed requiring all small
engines be clearly labeled:
"DANGER! DO NOT DRINK FROM FUEL TANK!"
I hope to heck I'm not too late.
"I suspect you\'re an arrogant little pissant who grew up in the
Red Bull generation." - CJW
Stabil is great product to use in 2 cycle Mix & regular gasoline in
which it has shelf life of six months.
more Great Products & Services at http://gentleenterprize.biz
I have seen some 2 cycle oil that also acts like Stabil. Or so it states in
so many words on the container.
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