Howdy... I just got my first results from Blackstone Labs for my 2000 Volvo. All values are within normal limits except Lead. I got a 7, and they state the averages to be 1. They state to have it rechecked in 5k miles for concerns of bearing wear. Ok... Now I had my '97 Expedition checked by Oil Analyzers Inc. not long ago and the lead was listed @ 11... but, the report states that oil is all within normal limits and I could continue use. Actually, several of my readings from O.A. are slightly over the universal averages reported by Blackstone. Oil Analyzers doesn't list the universal averages as does Blackstone. I'm using Amsoil in both engines. Any thoughts?