Originally Posted by slowturbo
Damn I have a SULEV. I thought I had seen this in some paperwork I got before but was in denial lol.
I wouldn't sweat it. This was one of those rare circumstances where having an N51 made a difference. Seems like BMW went to great lengths to keep the driving experience almost identical. Still, this is one of those things that isn't mentioned in any write up I've seen before though there may be a post about it somewhere. It's certainly not in the Bentley service manual. I just sort of "discover" this stuff as I go along.
Just know that birds chirp more happily, the sun shines more brightly, and mother nature sighs as you drive along cleaning the air with your prem-air coated radiator.