RE: Reading piston tops.
Rich,
You're still much too early o be obtaining any useful info from the engine. The only thing I can see right now is that you're using a lot of oil in the fuel, the mixture is on the rich side, and like Pe noted, it's a mineral oil. The bottom of the pistons will look ash grey or white if you've been running them too lean, too hard, or too hot.
Hughes500E:
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