Thanks for the helpful info guys. Wanted to report back that I used a turkey baster to remove as much of the BMW 50/50 mixture as I could (got about 2 L out), poured in a bottle of Water Wetter, and topped back off with straight distiller water. Oil temps are down about 10 degrees under normal driving conditions... Topping out at 230. Very pleased! Haven't tracked it yet, but I will report back after I do. Simple and worthwhile mod for sure!
Performance: BMW PS | M3 Arms | M3 Subframe Bushings | Dinan Camber Plates
Aethetics: Performance Side Skirts | Performance Grilles | Performance Spoiler