Thanks for taking the time to explain wear rates in terms of  per hour basis. That really helped as did explaining the DC-4 “smoking gun” for my high silicon rates. I should have called about that years ago! Thanks for being a great tool in my tool box for monitoring engine health along with annual compression tests, oil changes, oil filter inspections, bore scope inspections (a $200 gem that only takes 30 minutes added onto a compression test and I have a photo record of valves, pistons and cyl walls) and my own form of cruise “trends” from engine gauge readings. Thanks again, keep up the great service.