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Old 12-21-2007, 11:16 AM   #1 (permalink)
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Scorpion Gas Mixture question.

What is the correct gas to oil mixture for a 1979 Scorpion Sting 440? Thanks in advance.
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Old 12-21-2007, 12:50 PM   #2 (permalink)
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If you are using synthetic oil, 50:1.
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Old 12-21-2007, 08:59 PM   #3 (permalink)
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Quote:
Originally Posted by RJ Gleason
If you are using synthetic oil, 50:1.
What is synthetic oil?
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Old 12-21-2007, 09:00 PM   #4 (permalink)
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They have regular 2 stroke oil, and they have full synthetic (non-mineral). Synthetic is more protective, but also more expensive.
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Old 12-21-2007, 09:09 PM   #5 (permalink)
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Quote:
Originally Posted by smallengineguy
They have regular 2 stroke oil, and they have full synthetic (non-mineral). Synthetic is more protective, but also more expensive.
So if I have non synthetic oil, is the gas to oil mixture the same (50:1)?
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Old 12-22-2007, 07:48 AM   #6 (permalink)
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If you are using non-synthetic (dino oil) mix at 40:1.
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Old 12-22-2007, 07:13 PM   #7 (permalink)
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Hey RJ, for once I'll go the other way
The Snowmobile book says 20:1 but it only goes up to '78. That seems like WAY too much oil. I'll go with RJ at 40:1.
Use a good oil, Arctic Cat, Ski-Doo, and Polaris all sell good oils. Klotz, Amzoil and (damn, I forget, starts with a T) are all excellent synthetic oils. A gallon of good regular oil (AC, SD or Polaris) will run about $20 at a snowmobile shop. I'm using Castol "Go SNOW" right now and it seems real good, its also about $20 a gallon. A gallon covers me for pretty much a whole season, remember you use just over a pint of oil for 5 gallons of gas so a gallon is good for 30 some gallons.
Lots of people use cheap oil from Wal-Mart and the like and thats fine but remember that Scorpion parts aren't getting any easier to find... Don't use use marine 2 stroke oil, it'll want to separate when cold.
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Old 12-23-2007, 05:48 PM   #8 (permalink)
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Quote:
Originally Posted by curtludwig
Hey RJ, for once I'll go the other way
The Snowmobile book says 20:1 but it only goes up to '78. That seems like WAY too much oil. I'll go with RJ at 40:1.
Use a good oil, Arctic Cat, Ski-Doo, and Polaris all sell good oils. Klotz, Amzoil and (damn, I forget, starts with a T) are all excellent synthetic oils. A gallon of good regular oil (AC, SD or Polaris) will run about $20 at a snowmobile shop. I'm using Castol "Go SNOW" right now and it seems real good, its also about $20 a gallon. A gallon covers me for pretty much a whole season, remember you use just over a pint of oil for 5 gallons of gas so a gallon is good for 30 some gallons.
Lots of people use cheap oil from Wal-Mart and the like and thats fine but remember that Scorpion parts aren't getting any easier to find... Don't use use marine 2 stroke oil, it'll want to separate when cold.
I think I have the same book as you do (the intertec snowmobile book) and in the scorpion section of the book it only goes up to 1978 (on a 78 Sting it says to mix the gas at 20:1). I looked in the Cuyuna engine section of the book and it said for a 440 mix 40:1 so that is what I am going to mix it at. Thanks for all of the help!!
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Old 12-23-2007, 09:06 PM   #9 (permalink)
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I've been running 40:1 in my Scorpions with no problems. I run just about any oil I can find that has the proper SAE ratings. Normally I run Yamalube because that's what the local speed shop runs. It's a synthetic blend.
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