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So this is my new old motor. Did some googling around and read that some years they made the blocks out of Mercosil and that those motors should be run at a 40:1 oil ratio. Anything to this and what years would have had Mercosil blocks?
 

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The older blocks used nikasil chrome plating on the bores. The Mercosil blocks started in 1994 If I remember correctly? I've owned both and always mixed the oil at 50:1 without any problems.
 
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