2-stroke cycle gas/oil mix - BMW Luxury Touring Community
 
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post #1 of 11 Old Apr 2nd, 2008, 8:41 pm Thread Starter
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2-stroke cycle gas/oil mix

I have four yard tools that use 2-stroke cycle engines. Three of them are made by Stihl - two are new, one (the chain saw) is 10 years old. All three recommend a gas/oil mixture of 50:1 (using Stihl's 2 stroke oil, of course).

The fourth yard tool is a Ryobi string trimmer. Ryobi recommends a gas/oil mixture of 32:1.

I've mixed some 50:1 gas/oil for the Stihl engines. Any opinions on whether the Ryobi will seize up on the 50:1 mix? I don't really want to keep two containers of gas/oil premix in the garage.

Thanks for any opinions.

- Bob

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post #2 of 11 Old Apr 2nd, 2008, 8:53 pm
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Post Re: 2-stroke cycle gas/oil mix

I'd say that 2% mixture is pretty standard in 2 stroke engines, but if Ryobi recommends a higher mixture you should go with it.

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post #3 of 11 Old Apr 2nd, 2008, 9:30 pm
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Re: 2-stroke cycle gas/oil mix

Quote:
Originally Posted by bob_menton
I have four yard tools that use 2-stroke cycle engines. Three of them are made by Stihl - two are new, one (the chain saw) is 10 years old. All three recommend a gas/oil mixture of 50:1 (using Stihl's 2 stroke oil, of course).

The fourth yard tool is a Ryobi string trimmer. Ryobi recommends a gas/oil mixture of 32:1.

I've mixed some 50:1 gas/oil for the Stihl engines. Any opinions on whether the Ryobi will seize up on the 50:1 mix? I don't really want to keep two containers of gas/oil premix in the garage.

Thanks for any opinions.

- Bob
FWIW, I've been using 50:1 in all 2 stroke yard tools forever. Exhaust port build up is slower and my engines are always cleaner than other machines I have worked on that have used recommended higher ratio's.

I too, do not need all the various mixtures laying about. I also had a Ryobi trimmer, I traded off for my current Homelite. The Ryobi ran fine.

Your call though, just my experience.

John

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post #4 of 11 Old Apr 2nd, 2008, 9:55 pm
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Re: 2-stroke cycle gas/oil mix

I have several commercial landscapers using Snake Oil Saber Professional 100:1 full PAO synthetic 2 stroke oil in all their two stroke equipment at 100:1 with no problems in Houston heat and humidity. They like it because it is practically smokeless, does not foul plugs, the equipment runs cooler and lasts longer, protects better, and actually costs them less than the 32:1 mixture they used to use. Snake Oil was the first with synthetic 2 stroke oil since 1973. If you PM or email me, I can provide you with more information.

So if you use a good quality synthetic oil, you can go with a lower fuel to oil ratio with all of your two stroke engine. Maybe the best thing is to contact Stihl and Ryobi and ask them your question.

Last edited by andy; Apr 3rd, 2008 at 9:15 am. Reason: Typo
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post #5 of 11 Old Apr 3rd, 2008, 9:20 pm
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Re: 2-stroke cycle gas/oil mix

Try this:

Keep the 50:1 mix in the can for all the tools. But the Ryobi needs a 3% mixture rather than the 2% mixture.

If your Ryobi string trimmer is about like mine, it holds 18oz of fuel in a full tank. Add an extra 1% (.18oz/approx 0.2oz or about a teaspoon) of oil to each tank of fuel with the 50:1 premix.

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post #6 of 11 Old Apr 4th, 2008, 12:30 am
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Re: 2-stroke cycle gas/oil mix

I'd just split the difference. Won't hurt the Stihl & you canit kill the Ryobi.

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post #7 of 11 Old Apr 4th, 2008, 7:19 am
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Re: 2-stroke cycle gas/oil mix

I use 50:1 in all my tools and always have. No problems so far. FWIW, I have a friend who works in the tool rental in HD and he says that they are instructed to mix 50:1 also.

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post #8 of 11 Old Apr 4th, 2008, 7:50 am
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Thumbs up Sounds good to me!

Quote:
Originally Posted by bowlesj
FWIW, I've been using 50:1 in all 2 stroke yard tools forever. Exhaust port build up is slower and my engines are always cleaner than other machines I have worked on that have used recommended higher ratio's.
I have THREE freakin' cans in my garage with 3 different mixes. Well ... I'm done with that crap! As soon as the cans run out, I'm going to a 50:1 ratio for ALL of my yard tools.

Thanks John. Good info!
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post #9 of 11 Old Apr 4th, 2008, 8:00 am
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Re: 2-stroke cycle gas/oil mix

Have a yard sale and dump all that old 2 cycle stuff. Like you, I used to have separate cans for different mix ratios. I'm now on a campaign to replace all that stuff with 4 cycle engines. My latest purchase is a string trimmer with a great little Honda 4 cycle engine. Runs smooth, quiet, and starts with one pull.

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post #10 of 11 Old Apr 5th, 2008, 10:50 am
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Re: 2-stroke cycle gas/oil mix

Quote:
Originally Posted by Lynn_Keen
. I'm now on a campaign to replace all that stuff with 4 cycle engines. My latest purchase is a string trimmer with a great little Honda 4 cycle engine. Runs smooth, quiet, and starts with one pull.
But a 4 stroke needs to be much larger than a 2 stroke to get the same power out of it.
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post #11 of 11 Old Apr 5th, 2008, 12:20 pm
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Re: 2-stroke cycle gas/oil mix

Quote:
Originally Posted by Morley
But a 4 stroke needs to be much larger than a 2 stroke to get the same power out of it.
You must not know Lynn. He's quite a strapping man. You could mount a small V8 engine to his back, and he'd hardly even notice.
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