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Old 12-12-2012 | 01:20 PM
  #60  
Pete Bergstrom
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Joined: Apr 2002
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From: Champaign, IL
Default RE: New Evolution 10cc gas engine

There is a needle bearing on the bottom end of the rod and a bushing on the top end. We are continuing to do oil content testing for wear and longevity but for now we are sticking with the 20:1 recommendation. I expect we will be able to recommend either 25:1 or 32:1 in the future but as of right now we have no long term data to stand behind that.

Pete