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Discussion Starter · #1 ·
just wondering have 1968 skidoo olympic 370 opposed twin just wanted to know what grade of fuel should i be using and what i should pre mix it at cause every body telling me to mix it at 20:1 32:1 40:1 just wondering if i should stay at what the book say 20:1 or switch it up
 

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skidoo 68 said:
just wondering have 1968 skidoo olympic 370 opposed twin just wanted to know what grade of fuel should i be using and what i should pre mix it at cause every body telling me to mix it at 20:1 32:1 40:1 just wondering if i should stay at what the book say 20:1 or switch it up
[snapback]700087[/snapback]​
20;1 was for when oils were crap back then. You'd be fine at 32:1 with the oils now. Even 40;1 is OK if you're not running fast and hard. I mix about 32;1 for my 63 ,70, ans 72 Ski-doo's and they've been fine for years.
 

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Discussion Starter · #3 ·
so i be fine with 32:1 mix and im using castrol super oil now would i keep idle and high speed jets at the same setting as i was with a 20:1 mix idle 3/4 turn and high speed 1 and 1/4 turn or do i change them
 

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skidoo 68 said:
so i be fine with 32:1 mix and im using castrol super oil now would i keep idle and high speed jets at the same setting as i was with a 20:1 mix idle 3/4 turn and high speed 1 and 1/4 turn or do i change them
[snapback]700675[/snapback]​
Sound like good basic settings but each motor is a bit different let alone carb condition and cleanliness. If it was running properly with those settings, then you won't notice any difference at the 32:1 mix ratio...except less smoke and less plug fouling.
 
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