This OCI car saw 4 track days with oil temps between 250 and 275F. Previous 3 UOA's are also with GC. Redline 5W-30 went in this time. I am bit concerned about aluminum. Thinking about it I realize now that I might have made mistake while taking oil sample. I didn't take the drain plug all the way out and I let the oil sip over it. Given that my oil pan is aluminum that would explain the elevated aluminum... I don't have oil cooler, and block is cast iron. but what about sodium, could that come from the dirt on the oil plug? Last I checked I am not missing any coolant? Everything else looks normal. What do you guys make of it?