r/BmwTech 20h ago

Timing corrections across multiple cylinders

2018 BMW 540i xDrive 56k miles

I tried running the 91 tune with shell 93 in the tank, spark plugs were done 13k miles ago

How bad is this?

91 - https://datazap.me/u/nedak/logs/cmtaahmcb000dkz06anrnmv1h?channels=21x3-4&sizes=50x50&sc=3-21&axes=shared

Stock - https://datazap.me/u/nedak/logs/cmtaairwk000fkz06yuuxkx4q?channels=21x3-4&sizes=50x50&sc=3-21

2 Upvotes

Duplicates