Are you getting any other codes? Or: have codes started to migrate to particular cylinder? If you get enough misfires on a cylinder the computer will shut off that cylinder and the car will have little power and shake like crazy.

Wife's car we as only tripping misfires a couple times a week and an hour or two of driving with the cleaner seems to have done the trick. Your symptoms are 3-4x as bad and you've driven not enough to even get the temp to equilibrium. That said, I also replaced the two coils from the cylinders that acted up the most. So keep reading codes and see if you can find a cylinder that misfires the most is likely a weak coil.

Also: take out the plugs and clean them if they are gummy.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)