My friend MikeS300 has had good luck with shell 93 gas in his 17 540 BM3 stage 2, minimal to 0 timing correction...
https://bootmod3.net/log?id=64f62a22d10b4309cddca22d
It's a little out of the way for us living in Johnstown but I went and got some last night.
It measures e7 also. Wondering if that's a trend with top tier gas.
I've still got a little liquimoly fuel system cleaner in the tank (did that alongside oil change last weekend) so idk if it will log well.
Got a lot of soccer logistics this weekend so I'll probably go through a whole tank this weekend refill and get a log next week, maybe tomorrow 🙃
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2017 F22 M240i, Xdrive, M Performance Package
Active Autowerke Downpipe, Dinan Carbon Fiber Intake, Dinan Carbon Fiber Turbo Inlet, Dinan Mid-pipe, xHP Flashtool, MHD Stage 2
To do next list- #1- Wheel Spacers & Tires, #2- B58 TU Pump, #3- Flex Fuel Kit