You could also send a sample to Blackstone and have them analyze it for cheap.
Do the V6 have the oil life monitor?
2016 VW GTI 4 door DSG
1989 Sonic Blue Mustang LX Coupe, 349 ci,
392 rwhp 424 rwtq....Mustang Dyno
"There are three kinds of men. The one that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves." -Will Rogers-