[Piotrsko]

That would be the pilots fault either case for not checking prior to flight. Avgas goes from either red or blue to clear when other fuels are added as does jetfuel. I knew my fuel would go clear, and it did. Nothing else to check except for level or unexpected crud in fuel sump. Once again the pissy portion was mandatory tear down that I had to pay for. Even more annoying was I had one tank of original fuel which I used for take off and initial climb so knock was improbable. Had I payed cash for the fuel, they wouldn't have had a trace method and I would have escaped teardown. Chevron did finally pay for damage, but not the teardown.

Alaskan joke:<<If your private plane isn't overloaded, you are flying solo. >>