What does this spark plug tell you?
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05-12-2010, 12:55 PM
Motorized Bicycle Member
Join Date: Apr 2010
Re: What does this spark plug tell you?
I'm running 20:1 non-synthetic regular cheap oil. I will switch to synthetic oil and a much leaner oil-fuel ratio after a few gas-tanks.
I've heard this is best for a new engine.
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