Quite a statement...
Even though I agree with you and that 10K is pushing my comfort level, can you better support this argument?
I'm a mechanical engineer and I review thousands of UOAs and other automotive fluid analysis a year: buses, trains, trolleys... engine oil, trans. fluid, hydraulic fluid, gear oil, compressor oil, fuel samples, coolant. The list goes on.
I've studied under a senior engineer who's worked for Exxon-Mobil for 30+ years. I help develop PM schedules based on experience and oil analysis for the nation's 5th largest transit authority.
The community needs a better understanding of the countless factors involved. Not people making statements with unsupported "facts." The internet already has an abundance of those kinds of threads.