i regularly run bio blends between 5% and 15% in my Detroit Series 60 12.7L engine. I run the oil changes to 50% over the OEM recommended drain and things look fine Currently on 22,500 mile OCI's. Oil still good, but I am not looking to set some sort of extended drain record, so running 50% more than the OEM recommended level fits well in my comfort zone.
Hey there, VA, what do ya say? How many vets did you kill today?