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He has 35d but also he used it on his old E46 M3.
Not a single engine issue.
Anyway we tested it today, and huge difference is there believe it or not.
As be both have manuals, first gear is always bit clunky until you push it into sport+ mode, but now it's bloody smooth like warm butter.
We took some time and monitored oil temperature over secret menu, until it reached around 220F and then we started to push it up to 120 mph several times.
The temperate stayed same even it dropped due to nice M2 cooling, but we can't tell.
But what surprised us most us is that there isn't that annoying peach when on cruse control at going from 2.5k RPM up to 4k. To put it simple the engine is way quiet....
There might me some mpg improvement but we really didn't bother with that.
Also previous oil that was in there was super clean!
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