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Message: [QUOTE="2strokerfun, post: 1192691, member: 69719"] Just out of curiosity, I did Exactly that after my last rebuild. Used 20:1 927 oil. Engine never ran crisper. Did smoke a bit more than normal. BUT, OMG, when I pulled the cylinder off, I have never seen a more perfect piston. It didn't have one bit of carbon, machine lines all still visible on the sides. It looked like it had been polished and oiled. Had about 10 hours of hard trial riding on it when I pulled the cylinder. Well, so much for that experiment. It did get a bit expensive and hard to keep that much oil onhand. So I'm back to 32:1 and carbon-coated piston. The only draw backs were a little more smoke -- and not really that much -- a little more spooge and cost/hassle of using so much oil. The benefits seemed to be a strong running and well oiled engine. [/QUOTE]