Hi everyone, I've sent four oil samples to Blackstone Labs over the last 3 years, and each time my silicon readings have been higher than universal averages (see bottom row of the attached picture). The techs at BL have suggested checking the air intake system for cracks or leaks, implying that dirt and debris may be getting into the system downstream of my air filter. I've looked, but haven't found anywhere that appears to be leaking. Have any of you had similar issues you resolved, or do you know of any common failures points on the air intake system I can target? Thanks!