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What grade of gas to use

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5 minutes ago, Chuck said:

I ran regular in the Centauro on the advice of Dave Richardson. Never an issue in 42000 miles. Of course, I run premium in the 2V engines.

The V11 combustion chamber is somewhat more advanced than radial aircraft engines - but not all that much. Therefore, pre-ignition is an ever-present threat as we are in the pre-knock sensor world here. Lucky those who live near a friendly airport, eh?

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