So, the snowblower says 25:1, the string trimmer says 40:1, and the
power blower says 50:1. Anyone having a wee bit difficulty getting the
mixtures right? Seems all the little oil mix containers say to mix
with a gallon of gas and some don't even give the ratio on the label.
I mix the separate tool mixtures and keep each in a gallon milk
container in the shed. I use a permanent marker to write the mixture
ratio, # of ounces of oil per gallon, and what tool it goes with, on the
To get the proper mixture of oil per gallon of gas, divide 128 (# of
ounces in a gallon) by ratio.
i.e. 128 / 40 = 3.2, so a 40:1 ratio needs 3.2 oz. of oil.
25:1 = 5.1 oz per gallon.
50:1 = 2.5 oz per gal.
After spending a few moments to compute all my proper ratios, I made a
'guide sheet' in Word and posted it in my shed (right by my gas cans).
It goes like:
Weedeater XX oz to five gallons
Outboard XX oz to six gallons
That way I add the exact amount and don't score a cylinder because I screwed
up the mix.
Additional note: I add the oil first, a little gas, slosh around real good
and top off with gas.
I just mix one batch - to the richest ratio - and use it in all my 2 cycle
engines (two mini-tillers, four chain saws, water pump) - and actually I
usually mix it richer than the stated ratio - I never buy the manufacturers
expensive small oil bottles , just get quart bottles from major oil
companies and measure out 3 ounces in a few small glass jars - and I only
approximate the amount of gas I mix it with. Haven't blown an engine yet
(knock on wood).
When I ran the old 2 cycle Saabs and snowmobiles I bought the oil in a small
barrel (can't remember wether it was 16 or 20 gallon) but it seemed to gel
after a couple years even though manufacturers claim there is no shelf life.
Thanks to all the above posters. Y'know, I haven't seen anything
larger than the little (what are they 2 oz?) bottles of the mix that
says to mix with a gallon of gas. I like the idea of running a bit
richer mixture just so I don't need 3 or 4 seperate little red plastic
gas containers. As an aside, squirrels chewed through a wooden window
pane in my garage thinking they're gonna winter down inside and have
started eating the yellow plastic pouring spout on one of those
containers! Gas tastes good to squirrels?
That's what I do too. Use the richest ratio mix for all. These two
cycle engines are all very similar, it's hard to believe that even an
average ratio will result in much difference in the typical engine
life, which is pretty short.
My suggestion is this:
Run all your equipment with 50:1. The richer the blend, the more apt you
are to overheat and scauld the bearings. While it may seem that more oil
would prevent wear/tear...it is quite opposite in a 2 cycle motor. The
lubrication is throughout the entire engine, and the richer the blend, the
harder it is on the life of the engine components (especially if running at
Try this: stick one index finger into a cup of oil and your other index
finger into a cup of gas. Pull out both fingers at the same time. Which
one feels cooler? I attended a two week repair course for Stihl products,
and it made a believer out of me.
For the best deal on two cycle oil, visit your local Wal-Mart automotive
section. They have the little pint bottles for about 75 cents...which have
kept all of my landscape maintenance crews running for over two years now.
For those of you who use very little fuel, I recommend buying only one
gallon at a time, and also purchasing 89 octane.
try this and it works because gas evaporates at room temperature,
that's why it feels cooler. the less oil you run the hotter the
equipment will run, that's why at stihl school they harp on
adjustments and lean seizure. I went there too.
if you run stihl, echo, tanaka, husqvarna.. oils they are true
multi-ratio oils. run them at 50:1 even in old 32:1 or 16:1 and it
will be fine.
don't by the cheaper outboard oil!! it combusts befor entering
the combustion chamber, and will roast a 2-stroke in short order.
on a stihl chainsaw turning 13,000 rpm no load it will carbon
track the main bearings and lean seize the piston. on a piece of
crap like ryobi, or the other reed motors and low rpm equipment it may
8 years of small engine service experience showed me that, and we
did it at stihl school to a brand new saw. try your luck,
100:1 synthetic is fine. it's the cheap outboard crap that gets
people into trouble. outboards are water cooled, lawn wquipment is air
cooled and runs hotter.
quality oil is fine, crappy i only want to spend 50 cents oil is
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