OP, I'm enjoying your enthusiasm and ambition.
You say you went with the OEM Texaco fluid for "mixing" reasons yet toss in a quart of Dr. Frankie's Bug Juice to blend with BMW blessed voodoo fluid. Then, unknowingly stirring up trouble, you add a shot of Dr. Bugs' Franken juice to the crankcase oil!! Be abundantly clear, there are purists 'round here who recite LL-01 specs from memory. These would be oil chemistry experts who are spoiling for such crazy talk. They may issue a sound whacking. You have been advised.
Anything made can be made Better