Big_Bird

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Amsoil Dominator 50:1 at 50:1. Gas was 93 octane.

The engine was run for 6 hrs and almost 3 gal of fuel was burned. Engine
temperatures fluctuated 210-220 degrees. Outside temperature was 30-32
degrees. Engine rpm with a 24 x 10 prop was 6000.

After 6 hrs of running at full throttle, the piston was covered with brown
hard carbon 5-10 thousands thick. A 1/2 inch band running from the intake
port to the center of the piston was shiny clean otherwise the entire piston
was covered with carbon. No carbon was found on the ring, ring groove or
inside the dome of the cylinder. This carbon buildup was very similar to
Amsoil Saber 100:1 mixed at 50:1.