WOW! Taking that bad boy of the 560 SEL really made her fly. Smoothed out the idle too. Ya, this has been brought up many times. But just had to comment. I think I am going to adjust for 2 degrees though since 93 octane is the highest around here. 6 degrees though is insane. Fuel has come a long way in 20 years so I am confident I can go with 2 degree. No pinging now though, at least audible.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car