I just sent off the oil sample yesterday. The instructions said I could just put it in the envelope and just drop it into any mail receptacle. Hopefully, I'll get a report in the next couple of weeks. I put on a special note that TI and FMPM was of greatest interest due to the valve drop issues of the earlier engines. Don't know if that'll mean anything or not. This should be very telling. It's like doing a blood test on the engine. I had about 8200 miles on the oil. No oil use during this last run.