Thanks, the Castrol Edge Sport 0w-40 is exactly the kind of oil I was thinking about using as it meets BMW requirements and it's just a bit heavier when warm. So you guys don't think the 1M needs anything like the ER Competition Series Oil Cooler Kit? No problems with my oil temps off-track so far, but haven't tracked the car since the flash tune and just trying to avoid any problems later. Thank you!
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