Blackstone lab report for my 2011 Chevy 2500hd 6.6 LML Duramax with 96960 Miles. Oil used was Chevron Delo 15w40 for approximately 14,380 miles, with a Mobil 1-303 oil filter. This is my second report on this vehicle/engine. Oil was changed with Rotella t4 15w40 at time of sample. I’m not worried about slightly elevated potassium but would like to hear from you guys. I will test this sample again next spring when I change the oil filter mid-oci.