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Thanks Bob. The Continental web-site gives Mobile as the postal contact address.
Since summer 2010 the flow of Service information and so on seems to have dried up.

I am looking at the O-200-A that was certified on 80/87. Some of you are thinking of the US mogas quote averaging the MON and RON.

In Europe, refiner Total has launched an unleaded avgas UL91, very popular very quickly.
For certificated aircraft, EASA have approved the fuel provided the manufacturer also approves.
Lycoming...