[jmillet]

I switched from TWS to Red Line 10W-60 at 43,000 miles and lead at 10 ppm. Changed oil at 46,500 and analysis showed 21 ppm on the Red Line oil. Went to GReedy 10W-60 this time and will change again at around 50,000 miles.
My car sees a lot of high RPM driving school miles so the high lead reading doesn't surprise me. I've got $2,000 set aside to do the bearings if the next oil analysis shows continued high lead levels.
Blackstone Oil Analysis S54 August 2013.pdf