1999 Miata, 77200 miles
4qts M1 0W-40
M1 filter
This is my first OC on the car (well, second, I did one when I bought it). Oil has about 3K miles on it plus five days at the track. Looked to me like there was a fair amount of metal in the car. Didn't save any for an analysis, will do that next OC.
robert